Don't be discoraged!
I count as my friends two former AMA presidents. Maynard Hill is one and in a film presentation he pionted out the two perfectly built left wing panels to a plane he was working on. He was working on a right wing to finish the project. Maynard holds over 20 world records! The only person who never makes a mistake is the one that doesn't do anything.
Plan # 1
Cut the wing in half and use the tips to form the center section. This in many cases will be more work and trouble than plan #2.
Plan # 2
Get a wing kit from Sig or cut the necessary parts out for the new replacement.
As a professional woodworker I can tell you it won't be your last mistake. Just always be thinking about the next step.
EXCAP232