The 55ra install will be in the 50cc Revolver. There is only about a 100 rpm increase over the original 55 per DLE. The 50cc Revolver will be a good fun airplane to fly in the IMAC "BASIC" class. Yes, I will certainly compete with it in the Basic class. No, it can not be used in the higher classes of IMAC because there is no full scale "Revolver". Maybe I can get them to believe that the Revolver is basically modified Giles. Smile, maybe one day I can move up to the Sportsman class if I can get them to believe that story. It does look like a "Giles G202". Now all I have to do is find a full scale Giles owner who can verify my story. I fly scale, I fly Quarter 40 pylon, I also fly turbines. IMAC flying makes you a more precise pilot, you really learn how to put the airplane exactly where "YOU" want it to be. That's my story and I'm sticking with it. Chic