My crane wagon is ready, but the couplers are 2mm too low (can't understand why). When the track goes up on a ramp, the wagon separates from the others.... Not cool.
I tried to modifiy the STL file, but it's impossible even in Fusion360 (too many facets). Could you please send to me the drawing file of the Wheel Holder, so I'll be able to modify it.
Have you got the same problem with your printed wagon ?