Reputation Manager Scipio:
If you need something, please let me know.
Weapons and armor can be enhanced beyond Grade A for top-grade items and specialized for PvP. Weapons must have bestowed special abilities... Once it is enhanced, an item can only be used by its owner.
And once a multi-user item is specialized, you can use enhanced Spellbooks, but you cannot augment, soul crystalize or convert it. Be careful so that you don't have to cancel the effect.