RE: H-9 Sukhoi. FYI Be careful when and if you use the rudder to pick up the tail and push the plane around. It is real easy to push your fingers into the balsa sheeting on the fin. Same thing when removing wings from fuselage. If they are a little bit tight, it is easy to stick your fingers into the balsa sheeting of leading edge near the wing root. I have a Zenoah 80 in mine and it is 25.5lbs with no extra weight, but with (2) 1700 mah Ni cads on board. I don't see how one of these could weigh 23lbs with a Zenoah 80, even with the spring starter removed from the engine. A friend of mine has a ZDZ 80 in his, at just under 23lbs. NSSHERLOCK