It's a shame this thread has died off. The Super Skybolt is a beautiful plane.
Mine arrives today and I can't wait to get it in the air. I plan on using a Saito FA 82a that I picked up NIB. The 82 is only slightly less powerful than the OS 91 that is recommended by GP. I also intend to use high torque MG mini servos with a 6v battery under the cowl for balance. I'm shooting for 10.5 lbs. or less if possible.
I'll post pictures and a flight report for anyone who is still watching this thread.