Thanks guys! All of this is GREAT information. I've used the "Windex" method before with success on a wing panel that had a hump in the trailing edge and it worked great ... the 50/50 mix of water and ammonia may be a better alternative ... it would avoid the blue discoloration of the balsa.

I'm actually quite happy with the wing as it is ... except for the slight negative dihedral in the rear of the wing (the issue I brought up here). If the "Windex" method doesn't work, I'll try slitting the trailing edge, straightening it and then re-epoxying (while restrained!) ... I still have the "formed" trailing edge to install behind this sheeted area. (a piece of 2" x 1/2" trailing edge material to fill the center trailing edge of the wing) once I slit the sheeted area and then epoxy the "formed" trailing edge in place, (while restrained!) any minor deformity should be eliminated. Removing the sheeting and redoing it is another option ... worse case, I'll just build a new wing.

Thanks again for all of your help.

John