Its a very simple project and there are only a few steps: As motor I've used a "Mini Metal N20 3mm Shaft Diameter Gear Motor w/Gearwheel Model DC 6V 200RPM" The power jack: "DC Power Jack Female Panel Mount 5.5 x 2.1mm" I printed all parts on an Ultimaker 2+ in A) ABS, 0.4 mm nozzle, 0.1 layer hight, 80% infill. The Wheel.stl was printed 2x and glued together (I used acetone). B) woodfill filament 0.6mm nozzle, 0.15 mm layer height, 100% infill Fix the Power Jack, put in the motor and solder them together. (-> picture "open") Glue the "Cover" on top - done. This is the first project I post here - so let me know how I can improve my posting :)