And also started on soldering PC board ties at the edge of the liftout:
The last picture shows what I'm planning here. I'll have a large piece of PC board screwed to the deck, and will solder the PC board ties to that, then cut the rail. This is the track that passes over it at the sharpest angle. I'll bury the ties in ballast to hide the odd angles required to get a tie right across the end of the liftout.