Iīm not sure if that airplane is capable of doing a flat spins, i have flown two GP .40 300's but none of them are able to flat the spin, I can do flat spins with my Four star 40, GP Giles 46, Fun fly profile and some other airplanes but this one just donīt flatten the spin even with a saito .73 (or similar) in the nose, we tried to move CG but it didnīt help, use more travel but no way Jose.