Doubling Items!

For those who don't know. There is a way to double weapons (usually) in SNES versions of FFIV. You basically select an empty slot in your inventory in battle, select the item so it goes in the inventory, get out of battle, and then when you equip the weapon you will have two of them (unequip and equip again to separate them)

Did you use this glitch to your advantage when you were playing a version that had it?

I used to do this early in the game to double Dark Knight Cecil's swords to sell.