All I can say is move everything back. I have a rossi 45 in mine and its way to much rpms. I had to move the rudder servo the the rear of the plane the battery pack to the rear where the rudder servo should be and add tailweight. Oh don't forget to add wires to your stab for strength and also get rid of the crap landing gear. If I had it to do over I would put in a steerable tailwheel also. Can be a fun plane though!!!!