Summary This is a tweak from my original. I made the clip ends a little longer, gave it a bigger lip, and added a screw in cap to keep the spool from falling off. Print Settings Printer: Micro 3D Rafts: Yes Supports: Yes Resolution: 200 Micron? Infill: whatever Notes: If I were able to print all pieces at one time, I would use a raft because the small pieces may disconnect from the print bed. The clip bar itself needs model on model support. Post-Printing How I Designed This Tinkercad I don't know much about 3D printing. I use Tinkercad because I don't know how to use CAD programs. It's pretty sufficient.