One thing that annoys me is that you somehow get two grenades or mines for the price of 1 set of items. That makes no sense. You are practically cloning lunch boxes and tin cans. Wouldn't it make more sense that if you collected a second schematic the damage of that grenade or mine would be a little higher higher? For each spare schematic you collect the damage could be raised between 10-25%. Also I'd like to see this become compatible with FWE crafting. I'm sure someone out there has done this before but it doesn't increase the damage and not compatible with FWE crafting.
