Have a Slow Stick that has a warped wing. The left trailing outside edge is turned up about 1/2" when lying on a flat surface. This is my second wing and the first one was warped the same way. I have to use alot of right rudder trim to fly straight and that seems to make left turns sluggish. Is there any way to straighten of remove some of the warp. I tried heating the first wing with a heat gun but wasn't successful. Any suggestions would be appreciated.