I'd much more use such thing as kind of nerfed specialized workbench - when you use it, you are able to see and craft ammo only; at same time, other workbenches (plus character fixboy) display all available recipes for current character. Such thingie (as ammo press can be just one of them) could be used on maps where adding another workbench just to craft few extra things has little sense, not to mention that fixboy list can only get longer and longer~