Ron and Ron, thank you for taking the time to set me straight. Dihedral. Of course. As for the separation moving span wise on the wing, years ago, in a SG 1-26 I was wrapped up in a tight turn, coreing a thermal at stall plus 2 or 3. I glanced back at the wing trailing edge at the fuselage juncture. There was a triangular area that was obviously, visually turbulant. The skin was vibrating. I eased off back pressure and the turbulant area grew smaller. increased back pressure and it got bigger. Looks like it was time to re- skin the wing.
Bob