Hi Glen, thought I'd share my experience with my RC10. Regarding the exposure time, I ran with 900 second exposures most of the time. A lot longer than what I would have with my old F4 Newt.
The Sculptor was my first target when I got the scope, and I remember 600 second exposures worked well. 5 minutes worked well on large bright objects.
As for the focuser, I'd recommend replacing it. I found WAY to much flex in the stock one.
Erik
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