Hello Proptop: thanks for the reply. I agree the combo should provide good power. The problem is the CG. The motor and battery combo fall short about 7 ozs which caused the model to be tail heavy. I've looked at the 4120 AXI and a 4S2P TP - will likely use this combo in the plane. The 2826 is now installed in a Graupner Kadett. Tks again.