It won't be as hard as it may seem... knock out the blind nut's...fill in the holes with some wood dowel and epoxy and re drill the bolt holes in the right place... you can probably even reuse the blind nut's. If you question the rear wing mount at all just remove and replace it with better wood... then you have clean wood to drill into.

You could PROBABLY get away with the out of kilter wing... if you go this route then square up the tail feathers with the fuse... me I'd just fix it and be done with it.

John