I am using the Tak Clamshell, this is built like a tank. The guidescope is an ED 80 and it has fixed rings bolted to a Losmandy dovetail plate, which is in turn fixed to a Losmandy side by side saddle. (also built like a tank)
I was using the Tak guiding mount , which is not up for sale, for the ED80, but it is built to withstand a Hiroshima type attack I reckon and was just too bulky for my system. Eliminating this has not eliminated the problem. Obviously something in the imaging train is moving slightly, and it is just a process of elimination to find out what it is.
Definitely a frustrating process. What I have found out is that the stars are elongated in and E-W direction, so that may give me something to work on.
Thanks for your ideas, I will keep plodding along with this.
