X-No-Archive: Yes
"...dobs are hand-driven..." - NOT for many of us. I've been using an
equatorial platform for over 8 years, as have many others. Some folks
use a Bartels drive. And there are other systems in use to keep dobs
tracking accurately. I regularly view at 750X when conditions permit,
and the image will stay in the field for half an hour, if I have set up
accurately.

Shneor