When I setup wings (and it looks like you have a wing warp problem) I use 2 Robart Wing Incidence meters. I put one at the root and adjust incidence there as necessary. The other goes at or near the tip. I adjust the tip to match the root. I will move the tip mter from tip to tip but leave the root meter on so I get accurate relative readings al the way down.

I had a biplane that seemed to change flight characteristics from flight to flight. This method fixed it.