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Hi Richard,
Attached are some pics of a quick dob mount that I built for my Imaging scope. as PM'd, the radius of the azimuth board is 23cm, and the diameter of the altitude semicircle is 11.8cm.
I built this mount over a few days, thanks to ideas from Alex (mental4astro).
I've used a lazy susan bearing in the azimuth, and for braking, I placed three slide eazy pads from bunnings, and stuck some felt over it. the combined height was 1mm more than the gap of the two boards with the bearing, so the felt was pressing on the upper board. I tightened the pivot bolt a bit (M12 with a nyloc nut and washers), and its now very smooth with no overshoot and stays in one place. have attached castors as well.
I have to get some teflon for the altitude, and reduce the size of the ota cradle, apply some varnish.
thanks.
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