So there is no reason for a cap of materials to only be 400...it should be unlimited or up to 10k or something. As well the requirements to craft skill mods is 40 electronics ,29 titanium just to make a skill mod that wont even be what you need because theres way to much RNG . It takes to much time to farm electronics and other material . The requirements for materials are to high as well . Seriously take a look at these things before you release a game .