diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/data/xml/VariationData.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/data/xml/VariationData.java
index 74b32c2e28..fbbef17f54 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/data/xml/VariationData.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/data/xml/VariationData.java
@@ -231,7 +231,7 @@ public class VariationData implements IXmlReader
 	{
 		final Options option1 = variation.getRandomEffect(0, targetItemId);
 		final Options option2 = variation.getRandomEffect(1, targetItemId);
-		return ((option1 != null) && (option2 != null)) ? new VariationInstance(variation.getMineralId(), option1, option2) : null;
+		return new VariationInstance(variation.getMineralId(), option1, option2);
 	}
 	
 	public Variation getVariation(int mineralId)
diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/VariationInstance.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/VariationInstance.java
index 8352db1fd5..da2c01bcf6 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/VariationInstance.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/VariationInstance.java
@@ -16,8 +16,6 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Objects;
-
 import org.l2jmobius.gameserver.data.xml.OptionData;
 import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.options.Options;
@@ -37,17 +35,10 @@ public class VariationInstance
 		_mineralId = mineralId;
 		_option1 = OptionData.getInstance().getOptions(option1Id);
 		_option2 = OptionData.getInstance().getOptions(option2Id);
-		if ((_option1 == null) || (_option2 == null))
-		{
-			throw new IllegalArgumentException("Couldn't find option for id: " + option1Id + " or id: " + option1Id);
-		}
 	}
 	
 	public VariationInstance(int mineralId, Options op1, Options op2)
 	{
-		Objects.requireNonNull(op1);
-		Objects.requireNonNull(op2);
-		
 		_mineralId = mineralId;
 		_option1 = op1;
 		_option2 = op2;
@@ -60,23 +51,35 @@ public class VariationInstance
 	
 	public int getOption1Id()
 	{
-		return _option1.getId();
+		return _option1 == null ? -1 : _option1.getId();
 	}
 	
 	public int getOption2Id()
 	{
-		return _option2.getId();
+		return _option2 == null ? -1 : _option2.getId();
 	}
 	
 	public void applyBonus(PlayerInstance player)
 	{
-		_option1.apply(player);
-		_option2.apply(player);
+		if (_option1 != null)
+		{
+			_option1.apply(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.apply(player);
+		}
 	}
 	
 	public void removeBonus(PlayerInstance player)
 	{
-		_option1.remove(player);
-		_option2.remove(player);
+		if (_option1 != null)
+		{
+			_option1.remove(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.remove(player);
+		}
 	}
 }
diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/options/Variation.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/options/Variation.java
index 2b8ac65453..07d775ea5a 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/options/Variation.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/options/Variation.java
@@ -45,11 +45,15 @@ public class Variation
 	
 	public Options getRandomEffect(int order, int targetItemId)
 	{
-		if ((_effects == null) || (_effects[order] == null))
+		if (_effects == null)
 		{
 			LOGGER.warning("Null effect: for mineral " + _mineralId + ", order " + order);
 			return null;
 		}
+		if (_effects[order] == null)
+		{
+			return null;
+		}
 		return _effects[order].getRandomEffect(targetItemId);
 	}
 }
\ No newline at end of file
diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
index 1416c43ce0..ad87485fbf 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
@@ -104,14 +104,33 @@ public class RequestRefine extends AbstractRefinePacket
 			return;
 		}
 		
-		final VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
+		VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
 		if (augment == null)
 		{
 			player.sendPacket(new ExVariationResult(0, 0, false));
 			return;
 		}
 		
-		// unequip item
+		// Support for single slot augments.
+		final int option1 = augment.getOption1Id();
+		final int option2 = augment.getOption2Id();
+		if ((option1 == -1) || (option2 == -1))
+		{
+			final VariationInstance oldAugment = targetItem.getAugmentation();
+			if (oldAugment != null)
+			{
+				if (option1 == -1)
+				{
+					augment = new VariationInstance(augment.getMineralId(), oldAugment.getOption1Id(), option2);
+				}
+				else
+				{
+					augment = new VariationInstance(augment.getMineralId(), option1, oldAugment.getOption2Id());
+				}
+			}
+		}
+		
+		// Unequip item.
 		final InventoryUpdate iu = new InventoryUpdate();
 		if (targetItem.isEquipped())
 		{
@@ -122,13 +141,13 @@ public class RequestRefine extends AbstractRefinePacket
 			player.broadcastUserInfo();
 		}
 		
-		// consume the life stone
+		// Consume the life stone.
 		if (!player.destroyItem("RequestRefine", mineralItem, 1, null, false))
 		{
 			return;
 		}
 		
-		// consume the gemstones
+		// Consume the gemstones.
 		if (!player.destroyItem("RequestRefine", feeItem, _feeCount, null, false))
 		{
 			return;
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/data/xml/VariationData.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/data/xml/VariationData.java
index 74b32c2e28..fbbef17f54 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/data/xml/VariationData.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/data/xml/VariationData.java
@@ -231,7 +231,7 @@ public class VariationData implements IXmlReader
 	{
 		final Options option1 = variation.getRandomEffect(0, targetItemId);
 		final Options option2 = variation.getRandomEffect(1, targetItemId);
-		return ((option1 != null) && (option2 != null)) ? new VariationInstance(variation.getMineralId(), option1, option2) : null;
+		return new VariationInstance(variation.getMineralId(), option1, option2);
 	}
 	
 	public Variation getVariation(int mineralId)
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/VariationInstance.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/VariationInstance.java
index 8352db1fd5..da2c01bcf6 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/VariationInstance.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/VariationInstance.java
@@ -16,8 +16,6 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Objects;
-
 import org.l2jmobius.gameserver.data.xml.OptionData;
 import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.options.Options;
@@ -37,17 +35,10 @@ public class VariationInstance
 		_mineralId = mineralId;
 		_option1 = OptionData.getInstance().getOptions(option1Id);
 		_option2 = OptionData.getInstance().getOptions(option2Id);
-		if ((_option1 == null) || (_option2 == null))
-		{
-			throw new IllegalArgumentException("Couldn't find option for id: " + option1Id + " or id: " + option1Id);
-		}
 	}
 	
 	public VariationInstance(int mineralId, Options op1, Options op2)
 	{
-		Objects.requireNonNull(op1);
-		Objects.requireNonNull(op2);
-		
 		_mineralId = mineralId;
 		_option1 = op1;
 		_option2 = op2;
@@ -60,23 +51,35 @@ public class VariationInstance
 	
 	public int getOption1Id()
 	{
-		return _option1.getId();
+		return _option1 == null ? -1 : _option1.getId();
 	}
 	
 	public int getOption2Id()
 	{
-		return _option2.getId();
+		return _option2 == null ? -1 : _option2.getId();
 	}
 	
 	public void applyBonus(PlayerInstance player)
 	{
-		_option1.apply(player);
-		_option2.apply(player);
+		if (_option1 != null)
+		{
+			_option1.apply(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.apply(player);
+		}
 	}
 	
 	public void removeBonus(PlayerInstance player)
 	{
-		_option1.remove(player);
-		_option2.remove(player);
+		if (_option1 != null)
+		{
+			_option1.remove(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.remove(player);
+		}
 	}
 }
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/options/Variation.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/options/Variation.java
index 2b8ac65453..07d775ea5a 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/options/Variation.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/options/Variation.java
@@ -45,11 +45,15 @@ public class Variation
 	
 	public Options getRandomEffect(int order, int targetItemId)
 	{
-		if ((_effects == null) || (_effects[order] == null))
+		if (_effects == null)
 		{
 			LOGGER.warning("Null effect: for mineral " + _mineralId + ", order " + order);
 			return null;
 		}
+		if (_effects[order] == null)
+		{
+			return null;
+		}
 		return _effects[order].getRandomEffect(targetItemId);
 	}
 }
\ No newline at end of file
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
index 1416c43ce0..ad87485fbf 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
@@ -104,14 +104,33 @@ public class RequestRefine extends AbstractRefinePacket
 			return;
 		}
 		
-		final VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
+		VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
 		if (augment == null)
 		{
 			player.sendPacket(new ExVariationResult(0, 0, false));
 			return;
 		}
 		
-		// unequip item
+		// Support for single slot augments.
+		final int option1 = augment.getOption1Id();
+		final int option2 = augment.getOption2Id();
+		if ((option1 == -1) || (option2 == -1))
+		{
+			final VariationInstance oldAugment = targetItem.getAugmentation();
+			if (oldAugment != null)
+			{
+				if (option1 == -1)
+				{
+					augment = new VariationInstance(augment.getMineralId(), oldAugment.getOption1Id(), option2);
+				}
+				else
+				{
+					augment = new VariationInstance(augment.getMineralId(), option1, oldAugment.getOption2Id());
+				}
+			}
+		}
+		
+		// Unequip item.
 		final InventoryUpdate iu = new InventoryUpdate();
 		if (targetItem.isEquipped())
 		{
@@ -122,13 +141,13 @@ public class RequestRefine extends AbstractRefinePacket
 			player.broadcastUserInfo();
 		}
 		
-		// consume the life stone
+		// Consume the life stone.
 		if (!player.destroyItem("RequestRefine", mineralItem, 1, null, false))
 		{
 			return;
 		}
 		
-		// consume the gemstones
+		// Consume the gemstones.
 		if (!player.destroyItem("RequestRefine", feeItem, _feeCount, null, false))
 		{
 			return;
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/data/xml/VariationData.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/data/xml/VariationData.java
index 74b32c2e28..fbbef17f54 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/data/xml/VariationData.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/data/xml/VariationData.java
@@ -231,7 +231,7 @@ public class VariationData implements IXmlReader
 	{
 		final Options option1 = variation.getRandomEffect(0, targetItemId);
 		final Options option2 = variation.getRandomEffect(1, targetItemId);
-		return ((option1 != null) && (option2 != null)) ? new VariationInstance(variation.getMineralId(), option1, option2) : null;
+		return new VariationInstance(variation.getMineralId(), option1, option2);
 	}
 	
 	public Variation getVariation(int mineralId)
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/VariationInstance.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/VariationInstance.java
index 8352db1fd5..da2c01bcf6 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/VariationInstance.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/VariationInstance.java
@@ -16,8 +16,6 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Objects;
-
 import org.l2jmobius.gameserver.data.xml.OptionData;
 import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.options.Options;
@@ -37,17 +35,10 @@ public class VariationInstance
 		_mineralId = mineralId;
 		_option1 = OptionData.getInstance().getOptions(option1Id);
 		_option2 = OptionData.getInstance().getOptions(option2Id);
-		if ((_option1 == null) || (_option2 == null))
-		{
-			throw new IllegalArgumentException("Couldn't find option for id: " + option1Id + " or id: " + option1Id);
-		}
 	}
 	
 	public VariationInstance(int mineralId, Options op1, Options op2)
 	{
-		Objects.requireNonNull(op1);
-		Objects.requireNonNull(op2);
-		
 		_mineralId = mineralId;
 		_option1 = op1;
 		_option2 = op2;
@@ -60,23 +51,35 @@ public class VariationInstance
 	
 	public int getOption1Id()
 	{
-		return _option1.getId();
+		return _option1 == null ? -1 : _option1.getId();
 	}
 	
 	public int getOption2Id()
 	{
-		return _option2.getId();
+		return _option2 == null ? -1 : _option2.getId();
 	}
 	
 	public void applyBonus(PlayerInstance player)
 	{
-		_option1.apply(player);
-		_option2.apply(player);
+		if (_option1 != null)
+		{
+			_option1.apply(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.apply(player);
+		}
 	}
 	
 	public void removeBonus(PlayerInstance player)
 	{
-		_option1.remove(player);
-		_option2.remove(player);
+		if (_option1 != null)
+		{
+			_option1.remove(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.remove(player);
+		}
 	}
 }
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/options/Variation.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/options/Variation.java
index 2b8ac65453..07d775ea5a 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/options/Variation.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/model/options/Variation.java
@@ -45,11 +45,15 @@ public class Variation
 	
 	public Options getRandomEffect(int order, int targetItemId)
 	{
-		if ((_effects == null) || (_effects[order] == null))
+		if (_effects == null)
 		{
 			LOGGER.warning("Null effect: for mineral " + _mineralId + ", order " + order);
 			return null;
 		}
+		if (_effects[order] == null)
+		{
+			return null;
+		}
 		return _effects[order].getRandomEffect(targetItemId);
 	}
 }
\ No newline at end of file
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
index 1416c43ce0..ad87485fbf 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
@@ -104,14 +104,33 @@ public class RequestRefine extends AbstractRefinePacket
 			return;
 		}
 		
-		final VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
+		VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
 		if (augment == null)
 		{
 			player.sendPacket(new ExVariationResult(0, 0, false));
 			return;
 		}
 		
-		// unequip item
+		// Support for single slot augments.
+		final int option1 = augment.getOption1Id();
+		final int option2 = augment.getOption2Id();
+		if ((option1 == -1) || (option2 == -1))
+		{
+			final VariationInstance oldAugment = targetItem.getAugmentation();
+			if (oldAugment != null)
+			{
+				if (option1 == -1)
+				{
+					augment = new VariationInstance(augment.getMineralId(), oldAugment.getOption1Id(), option2);
+				}
+				else
+				{
+					augment = new VariationInstance(augment.getMineralId(), option1, oldAugment.getOption2Id());
+				}
+			}
+		}
+		
+		// Unequip item.
 		final InventoryUpdate iu = new InventoryUpdate();
 		if (targetItem.isEquipped())
 		{
@@ -122,13 +141,13 @@ public class RequestRefine extends AbstractRefinePacket
 			player.broadcastUserInfo();
 		}
 		
-		// consume the life stone
+		// Consume the life stone.
 		if (!player.destroyItem("RequestRefine", mineralItem, 1, null, false))
 		{
 			return;
 		}
 		
-		// consume the gemstones
+		// Consume the gemstones.
 		if (!player.destroyItem("RequestRefine", feeItem, _feeCount, null, false))
 		{
 			return;
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/data/xml/VariationData.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/data/xml/VariationData.java
index 74b32c2e28..fbbef17f54 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/data/xml/VariationData.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/data/xml/VariationData.java
@@ -231,7 +231,7 @@ public class VariationData implements IXmlReader
 	{
 		final Options option1 = variation.getRandomEffect(0, targetItemId);
 		final Options option2 = variation.getRandomEffect(1, targetItemId);
-		return ((option1 != null) && (option2 != null)) ? new VariationInstance(variation.getMineralId(), option1, option2) : null;
+		return new VariationInstance(variation.getMineralId(), option1, option2);
 	}
 	
 	public Variation getVariation(int mineralId)
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/VariationInstance.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/VariationInstance.java
index 8352db1fd5..da2c01bcf6 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/VariationInstance.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/VariationInstance.java
@@ -16,8 +16,6 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Objects;
-
 import org.l2jmobius.gameserver.data.xml.OptionData;
 import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.options.Options;
@@ -37,17 +35,10 @@ public class VariationInstance
 		_mineralId = mineralId;
 		_option1 = OptionData.getInstance().getOptions(option1Id);
 		_option2 = OptionData.getInstance().getOptions(option2Id);
-		if ((_option1 == null) || (_option2 == null))
-		{
-			throw new IllegalArgumentException("Couldn't find option for id: " + option1Id + " or id: " + option1Id);
-		}
 	}
 	
 	public VariationInstance(int mineralId, Options op1, Options op2)
 	{
-		Objects.requireNonNull(op1);
-		Objects.requireNonNull(op2);
-		
 		_mineralId = mineralId;
 		_option1 = op1;
 		_option2 = op2;
@@ -60,23 +51,35 @@ public class VariationInstance
 	
 	public int getOption1Id()
 	{
-		return _option1.getId();
+		return _option1 == null ? -1 : _option1.getId();
 	}
 	
 	public int getOption2Id()
 	{
-		return _option2.getId();
+		return _option2 == null ? -1 : _option2.getId();
 	}
 	
 	public void applyBonus(PlayerInstance player)
 	{
-		_option1.apply(player);
-		_option2.apply(player);
+		if (_option1 != null)
+		{
+			_option1.apply(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.apply(player);
+		}
 	}
 	
 	public void removeBonus(PlayerInstance player)
 	{
-		_option1.remove(player);
-		_option2.remove(player);
+		if (_option1 != null)
+		{
+			_option1.remove(player);
+		}
+		if (_option2 != null)
+		{
+			_option2.remove(player);
+		}
 	}
 }
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/options/Variation.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/options/Variation.java
index 2b8ac65453..07d775ea5a 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/options/Variation.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/model/options/Variation.java
@@ -45,11 +45,15 @@ public class Variation
 	
 	public Options getRandomEffect(int order, int targetItemId)
 	{
-		if ((_effects == null) || (_effects[order] == null))
+		if (_effects == null)
 		{
 			LOGGER.warning("Null effect: for mineral " + _mineralId + ", order " + order);
 			return null;
 		}
+		if (_effects[order] == null)
+		{
+			return null;
+		}
 		return _effects[order].getRandomEffect(targetItemId);
 	}
 }
\ No newline at end of file
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
index 1416c43ce0..ad87485fbf 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/network/clientpackets/RequestRefine.java
@@ -104,14 +104,33 @@ public class RequestRefine extends AbstractRefinePacket
 			return;
 		}
 		
-		final VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
+		VariationInstance augment = VariationData.getInstance().generateRandomVariation(variation, targetItem);
 		if (augment == null)
 		{
 			player.sendPacket(new ExVariationResult(0, 0, false));
 			return;
 		}
 		
-		// unequip item
+		// Support for single slot augments.
+		final int option1 = augment.getOption1Id();
+		final int option2 = augment.getOption2Id();
+		if ((option1 == -1) || (option2 == -1))
+		{
+			final VariationInstance oldAugment = targetItem.getAugmentation();
+			if (oldAugment != null)
+			{
+				if (option1 == -1)
+				{
+					augment = new VariationInstance(augment.getMineralId(), oldAugment.getOption1Id(), option2);
+				}
+				else
+				{
+					augment = new VariationInstance(augment.getMineralId(), option1, oldAugment.getOption2Id());
+				}
+			}
+		}
+		
+		// Unequip item.
 		final InventoryUpdate iu = new InventoryUpdate();
 		if (targetItem.isEquipped())
 		{
@@ -122,13 +141,13 @@ public class RequestRefine extends AbstractRefinePacket
 			player.broadcastUserInfo();
 		}
 		
-		// consume the life stone
+		// Consume the life stone.
 		if (!player.destroyItem("RequestRefine", mineralItem, 1, null, false))
 		{
 			return;
 		}
 		
-		// consume the gemstones
+		// Consume the gemstones.
 		if (!player.destroyItem("RequestRefine", feeItem, _feeCount, null, false))
 		{
 			return;