ER11 Collets Tray Organizer

This thing is an organizer tray for a set of ER11 collets plus two straight shank collet holders. It's designed to fit inside the Bangood #1122986 Retro Eiffel Tower Pencil case although there is no reason you couldn't use it by itself to store in a toolbox drawer.

I have included the STL as well as the Freecad file (0.18.4) so you can completely customize as you wish.