Summary Replacement spool holder for the FT-5. I wanted a spool holder that didn't hang over the edge of the frame. I also wanted it to be completely 3D printed. This works with 20mm 80/20 extrusion. The hole is sized for an M5 socket head cap screw. Works well with my other design: http://www.thingiverse.com/thing:1985861 Edit I removed the inner hole so the socket head cap screw would not jam the filament spool. Print Settings Printer: FT-5 Rafts: No Supports: Yes Resolution: .3 mm Infill: 10-20% How I Designed This Designed with Onshape