MT 3 Collet Holer

My visiting machinist friend was horrified when he saw my mill collets just sitting in a plain box. Something about surface finish and concentricity. So I made small storage stand for eight M3 collets. The parts can be printed flat with no supports and assembled with four self threading screws and cyanoacrylate glue. The end needs to be printed twice - obviously.

I showed it to my machinist friend, who approved, but said I really should have embossed the sizes into the top. Now I need to design a device that punches a machinist.