epicyclic train WIP

This is an epicyclic train. The idea behind it is that one of the gears is held stationary while the frame itself is being rotated, causing the gears to rotate in such a way that the gear on the same axle as the stationary gear starts to rotate too. It is a rather simple mechanism, but suitable as a desk toy.

You need to print the following parts:

2x frame
2x axle
1x double gear
1x large gear
1x small gear