I was been missing making a telescope, but didn't need another one. So I persuaded a colleague to make one with me. The optics were cheap--a 6" F/5 mirror (with a 1.5" secondary) from a Cloudy Nights seller for about $60. In classic style, this was going to be mounted in a Sonotube, with most of the rest made of 1/2" Baltic Birch plywood.
Step 1: Altitude bearings
I used a router to cut altitude bearings from 3/4" red oak. They are slightly more than semicircles. It's traditional for altitude bearings to be circular, but using semicircles (or slightly more), the radius could be made larger for semicircular bearings without wasting money on a wider board, thereby making for greater stability. Moreover, it's easier to cut less than full circles on my fixed-base router. And I cut lightening holes with a hole saw.