No offense but I think you just have a bad plane or are missing something. Like I said I have had two and also flown others at the field and never noticed this. The only Funtana I ever noticed a problem with was the Funtana 40 which everyone has heard about the tip stalls with that plane. Even with the right setup with the 40 you could almost completely eliminate the problem. I didn't check before writing this but if you havn't posted to mike about this in the pilot forum you should, maybe he can answer this better. Again I have never noticed any roll tendancy with this plane. Have you seen Kyle's video's of this plane, I wish he would chime in here I'm interested if he ever had any problems like this.
Lee