Had a pretty good day. Elevator is hooked up (nuts aren't tightened, of course):

https://photos.app.goo.gl/KXArXUM5bfs1xJT59

And a few notes:

Pro tip #1: for reaming and cleaning out the various threaded holes that get gummed up with powder coat, use cutting fluid. Totally worth it. Cuts like butter.
Pro tip #2: you will bung up the roll pin for the flap handle. It's a soft metal, not hardened, and pressing/tapping it in will deform it. 1/16" x 3/16" hardened roll pins can be had on Amazon, 500 for $18 or 30 for $10 (in 2021).
Pro tip #3: a round 8" by 5/16" b astard file is your best friend when fitting the wood tail ribs and floor boards around the welds.