My friend and expert welder made up mounting plates for the rotator assembly. We used an old driveshaft and cut off the u-joints. He welded these to the plates and the station 10 bulkhead mount that I previously fabricated. The station 10 buikhead mount is bolted to the tooling holes on the bulkhead with AN4 hardware. We then mounted the firewall board and the rear mounts on a borrowed fuselage rotator. The design works great as there is no binding when rotating. Also, you can have the ends at different heights if needed. Also, I began attaching the avionics mounting tray to the tubing forward of the instrument panel.