I 3D printed all parts at .15mm layer height, 20% infill, and no supports. I performed my usual sanding, filling, etc. process as in my previous projects to remove excess PLA as required. The video shows assembly and operating instructions as well, but to assemble the model, I performed the following steps: • Soldered red and black wires to the gear motor. • Pressed the gear motor into "Track.stl", noting a small dot of cyanoacrylate glue may be required to retain the motor. • Routed the wires out the side of the track assembly. • Inserted "Barrel.stl" into the track assembly, then pressed it onto the motor shaft, noting the position of the motor shaft and barrel flats. • Pressed "Cap.stl" onto the track assembly, noting a small dot of cyanoacrylate glue may be required to retain the cap. Once assembly was complete, I attached a 3VDC power source to the model making sure the barrel rotated counter clockwise as viewed from the top of the model, then added the ball bearings. And that is how I 3D printed and assembled "Marblevator, Spirals". I hope you enjoyed it!