I made a similar suggestion way back about Chunin Jonin Anbu scrolls and other mats that are obtained in the game that becomes obsolete when you reach a certain point this is also the same case with the thread and cloth that are given as rewards on Strong Approach.As we all know Strong approach is permanent I'm suggesting an Exchange system for these items instead of them just hanging around the character inventory maybe we could sythesize these to other higher versions (EX:10 Common Cloth = 1 Med Cloth)so nothing gets thrown in the bin,This is also the case for the scrolls I do hope the mods push this through with the devs I'm sure players will like this addition.