In typical Panglossian fashion today, I uploaded the STL file for 622’s plastic parts to Shapeways. I might have hit the big “Print” button, if the bounding box hadn’t precluded the use of their highest resolution machine.
It’s a good thing I didn’t because the pause gave me an opportunity to assemble all the parts in OnShape. There I found that the gearbox was going to foul with part of the frame and with the ash pan. Fixing these in the virtual world took only a few minutes, and everything will be pleasingly square and straight. Who knows what a hack I would have made of it in the real world?