The builds were done on a desktop cnc-machine by Stepcraft from
- 3 mm brass + 2 x 7 mm smoked oak
- 3 mm green POM + x 7 mm white oak + 3 hexnuts
and a classic skateboard ball-bearing Type 608 (8 x 22 x 7 mm) each. The POM was taken from an IKEA cutting board. It can be cut pretty well with a single flute end mill. To balance out the lower weight I added three hex nuts into the wings of the 3-wing spinner. The parts were press-fit and glued with epoxy.