Dan should know, but my Mini IFO has probably 45 degrees aileron movement in each direction and doesn't seem to suffer. I wouldn't worry about it - just enjoy
May I take this oppurtunity of thanking Dan for such a wonderful aeroplane. I only happened to buy a Mini IFO because our field was closed due to the Foot & Mouth crisis in this country. It has been a complete revelation, now that we have the field back, outdoor flying of 'normal' models seems entirely boring. I have flown just about every type of model over the years and can honestly say that I have never had so much fun as I have with the Mini IFO.