OK thanks vh2 just needed to get that out of the way as to how much flying you have done.

If I were you and you wanted to make this a successful airplane here is what I would do. First make sure there was no up down or side thrust either way with the engine Then I would make sure the incidence of the wing (a line straight through the farthest point forward of the leading edge and through the furthest point aft of the trailing edge) is paralell with the thrust line, this is the chord line. Then I would make sure the stabilizer (the fixed portion of the horizontal tail is also paralell with the thrustline and wing chord line.

Now we have to move onto the CG, This airplane will not work with the CG at the leading edge it is no longer a controlline airplane. Balance this airplane at 20% No further back (this is important).

Now its also likely that you have far to much elevator throw if you have followed controlline practices. Set the throws at no more than 1/4 inch up or down at the trailing edge, no discussion. If you have a modern radio perhaps 25% expo plus or minus depending on radio make required to acheve soft center.

On the ailerons I would add surface area especially near the wing tips perhaps squaring them off a bit.

Throttling an OS pet with that carb is at best difficult, its a two speed carb and was never intended for anything except full speed or a high idle. Throttle response is, well it is an after thought.


Just an opinion

John

Hm there is no such thing as a "Devil Airplane" only a confused an bedeviled pilot