hi don thanks for the reply but i am a little confused..when u are balancing for c.g is that not balancing the plane nose to tail? not quite sure what u mean by that. and as for the finger tip method we were doing that last ngiht and we still had the same effect. when we added wait to the tail the front end was dropping and the tail was actually lifting and vice versa should the tail not drop when u add weight to it? it does will all ourother planes except for this one!