I had some time to goof around with this yesterday in the snow.
I took it up and rolled it left (not holding it in) and then used elevator to do some very tight level circles (laps) I don't know what to call it , but it is counterclockwise circles looking from above. I was able to use full elevator travel with no problem and no loss or gain of altitude (very predictable)
When I did this with rolling to the right (not holding the aileron in) and using elevator to maintain a tight circle , as soon as I got to a certain point with elevator it immediately spiraled down sharply to the right even more (as if I had applied right aileron again)
I also figured out that it really doesn't do it all the time either. I can make a tight loop once in a while with full elevator. Also when looking at the plane fly it kinda appears as it's flying with a heavy tail especially at slow speeds. I don't think I can get it inverted.
I took out 40% of the elevator with a D/R switch to try next time and then if I can fly it without ailerons I'll remove the ailerons all together and hopefully I could fly it with my left stick and rudder only just to test it. I guess if the problem goes away at least that points me to an aileron problem?
Believe it or not, this is a little bit fun for me. A good way to learn.

Of course I'd be bummed if this was my only plane.