A friend and I have recently finished an RV 3b and today completed the 40 hours of Proving Flight. My friend has built and flown an RV6 and RV9. I have been involved in building and flying an RV6, two RV7's and an RV8. All the flying reports we have read comment on how light the controls of an RV 3 are. We have trimmed our aircraft to fly straight and level but experience heavy aileron input, when compared with the other RV's we have flown, as the speed increases. Have any other RV builders had a similar experience and if so how have you solved the problem ? Our aircraft has a Lycoming IO 320 and MT two bladed prop.