I had all kinds of fun checking, double checking, triple checking everything a zillion times. This was a very iterative process. Everytime I touched one thing it would throw something else out of alignment. It took quite a while to get everything perfect. I tried a bunch of things to make sure there was no sweep. I hung 4 plumb bobs on the wings, two on each wing. I then tried using a laser light on the floor to align the plumb bobs but the laser was about a 1/4" off the floor and the first plumb bob would block it's light. I then tried snapping a chalk line but this didn't work too well either. The chalk line was heavy in some parts and virtually non existent in others. Plus I wasn't too confident that the line was perfectly straight. I ended up just using a tape measure pulled as tight as I could and aligning the wings / plumb bobs to one edge. Finally, no sweep! All of the plump bobs align.
