I'm not sure if you're up to making more bricks, but I would really love some extra variants from your "bolt" brick in the Minute pack.
Things like wall and ceiling variants, and other types like bolt-nuts and screw heads.
Maybe even make a chance on plant where the bolt is slightly raised out of the surface in the same way those books work?
Might be a bit much for bolt-head bricks, but I could really use them. I've tried to make them myself to no success...