I think that I just flattened out the bottom a little. The base of the rudder is still 6-1/2 inches from hinge to trailing edge. At the top of the vertical stab where the rudder counters over the stab, its 6 inches from front to beck, horizontally. I angled the top edge, from front to back to give it a little more on the back side and so it wouldn't look like a 'flat top'. The results are that I do not mix the ailerons and corrections are normal for conditions, read wind direction. I like to tinker and do realize that the mods can be equaled just as well with a 'mix'. Joe