
I spent some time drilling the two popup tipup arm pivot points up to a larger size. Still
not final size, but I decided that I wanted these to be perfectly interchangable, so the center
to center distance between the various holes needed to be exactly identical between the two
arms. It turns out to be quite a challenge to drill exactly perpendicular holes at exactly
the same spacing through two thick parts. Anyway, after some time I had them matched.
