The upgrade system is a bit janky, first of all, items upgraded with bars of the same tier never get increased damage, sometimes if its a higher tier it still downgrades damage significantly, and the list itself is broken, shouldnt there at least be a way to configure what you can upgrade with and how much it upgrades a weapon? because last time i checked, martian saucer trophies are apparently bars, yet auric, meteor and cosmic arent according to the list.