Wing-Bolt Alignment

If you’ve ever had to build a replacement wing, you’ll know how tricky aligning the new wing to the existing attachment bolt holes can be. Here’s a good way to do it: Shorten a couple of ballpoint-pen refills, slip a small O-ring over the point, then insert the refill into the bolt holes in the mounting blocks, capturing it with a second O-ring slipped over the top. If the refill fits too loosely in the...