Brio Crane Repair Kit

I used the great gears.scad (getriebe.scad) library. 

See: 

https://github.com/chrisspen/gears/blob/master/gears.scad

https://www.thingiverse.com/thing:1604369

One important gear was missing in this kit. So I remodeled all gears to get a perfect match.

Just place gears.scad in the parent folder.

I screwed the new crank into place with a small M2 screw.