Summary I use these to stabilize my PrintrBot Simple Metal and as a mounting structure for my Pi noIR camera. You can see them featured with my Pi noIR Case with Spotlights. Print Settings Printer Brand: Printrbot Printer: Simple Silver Rafts: No Supports: No Resolution: 0.03-0.02 Infill: Sure - if you want Notes: Print flat with material of choice with no supports. Hex are for 1/4'-20 NC bolts, holes are for 1/4"-20 tap. Use the feet with bolts to level the Bot. Print (1) Front Body and (1) Rear Body and (8) Feet. Use your favorite glue with the bolts in the hex, mine fit press tight.