Looks like it will fit on my build plate and it matches your 14 hour print time.? But as it turns out I also only have ER-20 collets.? Thought I had ER-32s too.?? So for now the little wooden box that holds the ER-20s will do.?
see STL file.ER 32 Tray I use Mastercam v 8.1 (2002) for all my CAD and CAM. Old version but never lets me down for Mill and 3D printer, still working on g codes for my CNC lathe .Almost there.