RE: Ideas for eliminating tip stall, or undersireable wing drop upon stall.
Or other thing to check is rudder trim. Airplanes will drop to the deflected rudder at stall (assuming everything else is straight). Even a very minor deflection (undetectable to the naked eye) will cause a roll off to that side. Just for grins put in a touch of left rudder trim and see which way she breaks. A lot easier than cutting up your wing etc
Dave