I pounded in the little metal pieces, which was a pain. The right way to do things was to pound in the little metal pieces
before moving the red plastic posts. This way, the red posts obstructed me. Use a small piece of plywood and a plastic mallet, as shown. I originally used just the mallet, and I bent one of the metal doodads pretty badly. Then I tried using the flat edge of a chisel instead of a soft piece of plywood, that didn't work very well, I took a chip out of the playfield.
Finally, the plywood+mallet method worked okay for most of the rest of the metal pieces.
Another thing I learned was that I should have drilled all the pilot holes before sending the playfield off to be clearcoated.
So, for future reference:
1) Move the little metal doodads before the red posts.
2) Pound in the little metal pieces with a plastic mallet, using a piece of plywood to distribute the force evenly.
3) Drill the pilot holes before sending the playfield off to be clearcoated.
4) The screw keeping the rotisserie from rotating is not strong enough. Make sure the rotisserie is kept in place by another method, rope, bungee cords, or whatever.
Here's the latest picture. The next step will be ordering some replacement red plastic posts from PBR, installing rubbers, then it will be time to mount the new playfield in the second rotisserie.