After last week's dry run with the whole frame assembled, I decided that the altitude bearing wasn't light enough. I decided to buy a couple of track rollers from McMaster, along with brass threaded inserts, and installed them in the central beam of the base. I'm glad I did, because this modification makes it almost as easy to adjust the altitude as the azimuth. I can kind of adjust how much weight sits on the teflon pads by shimming them with washers, although it's not especially convenient to do this.
I also built the tripod-ish base that the azimuth bearing attaches to. Nothing too fancy there. The whole height of the base is a little on the tall side, but still not enough to require anything more than a step stool to use when viewing.
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