Course, the other reason for this reaction to 'knife edge' flight is simply that when it was designed there was no KE in any pattern. The model is simply not designed to fly in this fashion. The apparent 'trim anomaly' you have is perfectly normal for a Kwik Fli. You can try to trim it out with all sorts of computer mixing, but in the end you just have to live with it. If you really want to fly 'KE' then any modern park fly or 3D type will be much better.
Evan, WB #12.