Regarding the GP Gee Bee

Man I have to tell U I built this plane and loved the way she turned out.

HiTec 605 on everything 645 on Rudder.

Saito 150 GK Master Airscrew Classic 18 * 6 prop

She ripped just like a pylon racer. Took alot of rudder on Take Off and she launched nicely.

Don't use the GP CG in my opinion it's a bit to far aft.

She lasted for 11 flights then on landing in 15mph winds she made a violent snap and it was toast.

The secret is keep this bad gal moving and land her on Low Rates moving the CG .5 forward.

Best of luck and don't forget detail that fake motor and make some Spark Plug wires.
Using the Pilot figure U have to slice his neck for him to fit. Build her lite.

Best of Luck