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Summary Couldn't find a frame-mounted spool holder for the Alunar 3D printer, so I designed one. The mounts clamp on without the need of any extra hardware. Need to really clean up the edges and corners on the dovetail joints to get them to fit, but once you do, the spool holder is surprisingly sturdy. Matching accessories: Spacers: http://www.thingiverse.com/thing:1752025 MicroSD Holder: http://www.thingiverse.com/thing:1752205 Tool Holder: http://www.thingiverse.com/thing:1752265 Print Settings Printer: Alunar Prusa i3 (A8) Rafts: No Supports: No Resolution: Cura 2.1 Default - Low Quality Infill: 10% How I Designed This Explanation of Design This is designed to fit on the Alunar print bed. Uses a dovetail joint that works really well if you clean up the corners; I use a flat-head screwdriver to smooth it down the edges and corners. It's a snug fit. The frame mounts need to be forced on, but they clamp on really tight. It makes for a shockingly sturdy spool holder. In Cura, you can mirror the object. If you use the original file and the horizontal mirror, you can fit both of them on the same print. At low-quality with a 10% infill, it takes about 4.5 hours to print both of them together.