Thanks Mark. I thought I remembered seeing comments about grounding concerns with 492 drive as well, but IIRC that was for the "no relay box" scenario. Will try it out next non-cloudy night.
If the weather stays like it has been the last week or so (clear & sunny daytime, cloudy at night) I may end up having to use one computer to drive the camera and another to generate a moving starfield I can track :(?
If I am able to guide with the ZWO cameras (which now seems like a pretty sure thing) then I'll probably still try to resurrect the ST-237 so I can play with a cooled camera without further investment, but agree it's not going to be worth the hassle/risk to try guiding with it.?
