I'm finishing up and GP Super Aeromaster 60 which is identical to the AAMCO Aeromaster Too (I have that kit also) except for the cowling, wing attachment, and rear wheel attachment. I went with version 3 (both wings 52-1/2" swept). The ailerons are 19 inches by 2-1/4 inches and two (2) provide all the differential the plane needs. Watch the CG it is different for each version. I had a version 3 Aeromaster (AAMCO) bumper kit from 1982 to about 1993 or 4 with painted silk. It flew quite well but covering got tore and rear end was terribly soaked with exhaust. This one is covered with Ultracote and powered by a ST 61 ring. My trouble areas were throttle linkage, and one aileron wasn't flat. I would also recommend not using rubber bands for wing attachment per the AAMCO kit. That is the one positive improvement of the GP over the AAMCO. Also, don't ignore the 1 deg neg incidence on the upper wing. It helps. Stay in touch and be real careful about the mods you make to this plane.