Double idea for handling the glamour system and a new type of logbook
Basically wouldn't be better to have a logbook where it records every piece of gear you have obtained throughout the game, and also be used to glamour your gear? That way you don't have to carry around inventory forever, and especially in your retainer's inventory. Want to glamour your lvl 80 spear to a unique dungeon spear you obtained earlier but don't have it anymore? Just look into your logbook and done! it's glamoured.
Also it would be cool to have a logbook of gear sets just to see what you may have missed and have obtained before.
Achievement title - Armoury Master! :)
Though I wonder this might cause too much of a strain on the server if everyone was glamouring like crazy from it..