Hi Ron, I don't know if you've flown a VP, but control harmony between the stabilator and ailerons is not as good as it could be. The stab is light, crisp and solid but the ailerons are a little heavy and the roll rate is a little slow and sluggish. History has proven that this isn't a problem, just an area that could be improved. It's safe to say the aspect ratio of the VP's ailerons is probably too low. It's even out of the "Approximate Proportions for Best Results" range in Bud Evan's Evans Lightplane Designer's Hanbook. ...it's way out in fact. The "fattest" ailerons recommended are 20% of the wing chord and 48% of the simispan. The VP-1's ailerons are 31% of the chord and 39% of the simispan. But it's probably the simplest way to do ailerons and simplicity was what he was after. By widening the ailerons one bay and shortening the chord by 5" you'd get an aileron that was about 21% of the wing chord and 50% of the simispan, just off the high AR end of the "recommended" chart.