What an awsome design! I printed everything and am happy with the visual result. All assembled, however, the friction between de bearing weels and the support is to high so it will not rotate smoothly enough. Also, the cone comes loose at the rop.
Printed with PLA, 210 degrees, 0.28 mm layers, 35mm/s speed, 4 perimiters of approx. 0.5mm thick.
 After some sanding and lubrication with thin machine oil, it now runs smooth enough!!! Happy with it! [/edit]