Modular Dremel bit holder

Thanks to RGN01 - I needed a way to hold my Dremel bits also however I have several places where I need bits and not all bits need to be in the same place at the same time.

Also, as I get more bits, I don't want to have to print the whole tool holder over just to accommodate a few new bits so I added slots and a connector so that multiple smaller ones can be fastened together to make a bigger one.