The fuel tank is moved back further than the stock gas configeration. I marked the center of the fuel tank, and put the center of the tank directly over the recommended CG. Both the ignition and receiver batts are directly behind the fuel tank. With the DL50 tricycle gear configeration it balances about 1/2 inch behind the stock CG of 150mm. So slightly tail heavy. It is a beast. I take off at 1/5th throttle, 25ish feet, at rotation it climbs vertical unlimited at that stick position! I use the stock wheels, and get only 2 inches of ground clearance with the prop. I fly off of concrete though. Grass might not work without the 6 inch wheels.