Marble Exercising Machine - Part 7 - Closed Archimedean Screw

This part of the Marble Exercising Machine is the Closed Archimedean Screw.

The components needed are:
One of each of the stl files above, except:
Bearing wheel - 4 off.

Note that the belts need to be printed using a flexible material such as TPU-95A.

And 'common components' from part 1:
Bevel gear 12 type 1 - 2 off
Belt wheel 12 - 1 off
Belt wheel 15 - 1 off
M6x10 cap screw - 2 off
M8x7 large head thumbscrew - 5 off

Also required are 3mm diameter stainless steel