Tonight, I installed 1/2" water pipe in the tail wheel mount, bolted it to the U-joint and then used a nipple going through a 2"x10" wood block with a coupling on the aft side to hold it in place while allowing it to travel fore and aft as needed. The rotisserie works good and I plan to connect the front and aft engine stands with a 1-1/2" angle. The angle should secure everything and make it portable and stable.
Next, I installed 18 K1000-8 nutplates in the F-707 bulkhead. I then installed four more on the bulkhead cover and fabbed the UHMW blocks for the shoulder belt cables.
Don Jones stopped by to inspect my work. I think I passed.