Some guiding graphs from last night. I switched to 15 sec guiding exposures, and part way through the first graph, I changed to King tracking rate.
This one west pier side (so scope pointing east):
And this is east pier side. The extra long dither in the middle was me finally remembering to check the focus. I have temp compensation on and the focusing didn't seem to adjust much at all, so that was good.
Unless I discover anything more, I'll probably wait until I can get my RC10 on for further reports. So far this is a very nice mount and I'm quite happy how it's performing so far.