I don’t that’s too great of an idea. In most basic RPG’s, you can’t equip three helmets. Sure, FW could have certain clbumes where you could equip multiple items at the same time (which probably would be the Special Items category). For the most part, however, you should be able to know what category your item belongs to before you buy it.

It’d help newer players make purchases easier as well, since they know not to buy an item in a category that they already have used up.