One thing that bugs me is how many toxic sludges you find. Even if you use toxic gas grenades in every fight that isnt trash mobs, there's still probably more than you can use. I made one thread recently about toxic gas grenades being mk1, 2, and 3, but other than that it occurred to me that it would be neat if you could make toxic sludge ammo for chem guns; we know in-game that bio can come in projectile form. Too late for underrail, but for infusion maybe.