Wing skeleton alignment
I made some home made jack screws to help keep the wings straight on the wing stand. The main spars want to sag a lot under their own weight in the middle. I made two jack screws for each wing out of a 4×4 and 3/8″ threaded rod with nuts and fender washers. I drilled a hole in the ends of the 4×4s to fit the threaded rod into, then a washer and a nut. It is a pretty cool setup. Some fishing line clecoed to the spar to show straightness lined up with the rivet holes and adjustment of the jack screws was easy. Next is to align and clamp the rear spars to be sure I assemble things without building a twist into the wings.
