Hi Alex,
I am glad to hear that you have found out the reason for the dob not staying put. I must admit that it was starting to annoy me in the small time I was using your excellent scope on the weekend. It almost, "almost" made me want to rush out and buy a dob. Ahh yes, then I remembered my tracking EQ mount and viewing Centaurus A as well as M104 - Sombrero galaxy through my scope and I fell in love with it again.
Doesnt mean I wont ever buy a dob, but for now, I will make do by stealing some time on yours whenever we catch up, which by the quality of the WSAAG night is anything to go by, will probably be every meeting
PS. I like the signature, very cool.
Cheers
Chris