Hi Brian,

I found the rib jigs to be quite ackward on the GP Extra as well. To do anything on the wing while it was standing on the jigs was virtually impossible so I tack glued the jigs to the tip ribs and that made it much easier.

Regarding your first wing, before you make a new wing...why not use your iron to remove the sheeting on the side with the warp then check to see if the warp is still there? If, as you think, the warp was pulled in when you applied the sheeting taking the sheeting off would remove the warp. You could then just reapply the sheeting (in whatever manner suits you best), less work than building a complete new wing and also will let you know if the warp was a result of the sheeting or rib notches too tight to the spar.