Hi there. The problem you described is how mod should work. Mod converts belts to modded belts when main player inventory changes(picked up item, crafted item or so). Also mod converts only belts that appears to be in player inventory. The recipe way of conversion sounds interesting, but i guess this will be more complicated: mod will need to make additional recipes to all belt qualities, so there will be 2x space used by mod and mod will created too many recipes, so game will became unplayable. I think i can do something like selection tool, that will convert all selected belts to modded ones. What do you think? Also, thank you for your feedback, it provides me useful information to make mod more user friendly!