Crunch time. After three chassis builds, will the wheels turn over then power is on?
The omens were good. Those rods slipped straight on, but then as the bearing spacings were set by the rods, you'd expect that. Add in the massive amount of slop those oversized holes in the rods allow, and if there was a problem, it would be a BIG one.
For testing, the rods are retained with a bit of insulation stripped from a wire. This trick saves a lot of soldering action if there is a problem and they need to come off again for fettling.
A bit of electricity from my 60-year-old H&M controller and the model works!
To be fair, it worked a lot better once a drop of oil was applied to each bearing. I know all that rod slop is bad engineering, and that the worm gear really should sit over the middle of the axle gear, but I'll take this right now. The model moves up and down the track, and it's long while since I built something that did that.