I have to say you have a gut of iron to keep doing your maidens.
The wing has a twist, pretty obvious. My TF SE5a has a twisted wing and it flies OK. My question is how much throw do you have? How much can you push the controls back when deflected? I can push the ailerons quite a bit on mine. It makes it a handful. I fly more with rudder and use the ailerons as a wing leveler. Mine is not aerobatic because of that. I can get about a 1" of movement and I can push them back 3/8". Because of that they have a centering problem too that is the handful part. It is what it is. I ended building some new wing wires with parkflier clevises so I could have some adjustment. Mine likes a lot of nose weight even though I could fly it tailheavy and did for a couple of years.