Well I received my 12" Dob on Monday after ordering it from Andrews on the previous Friday, talk about quick, and after spending ages I think I have it pretty well collimated. I took it out of the house on a trolley and tweaked the primary mirror again before a brief viewing session, bloody clouds.
My question is how often do you have to collimate the secondary mirror as this was the difficult part. The primary was dead easy. Do you find that the secondary pretty well stays put and it is the primary that needs most of the attention?
