Some extra details for the discussion.
I am using two DSLR's ( 450D and the SONY ) plus I use my ASI120mc for planetary imaging and hopefully DSO later. I currently guide with a 80F5 ( Good old shorty scope ) and a Phillips SPC900 which in the Lunt refractor configuration was mounted on a chopped off AZ3 head. Heaps of adjustment and very stable on a common mount plate. Unfortunately it is too tall to fit to the 8F8 and would probably cause some off balance issues.
I also have to contend with some LP problems. The 80F5\SPC900 works well once you have the exposure values right in PHD2 although it suffers sometimes with LP induced contrast issues. But 95% ok to go but I need some latitude to find suitable guide stars.
I am hoping my guide mount project will resolve the problem by low profile and weight but still be stable and have sufficient adjustment to find a star.
I queried about OAG as it is the next possible solution but I see limitations in the ability to find and hold target adequately.
I have another possible partial solution also, the resurrection of my beam splitter project from an earlier idea. I acquired a better, bigger quad prism cube and stabilised construction and got it parfocal. It would be suitable with the ASI for added length but not the DSLRs being only 1.25".
Heheheh, keeps me busy and amused for sure. The Lathe\Mill is already proving it's worth in accurate manufacture and better finish.
Thanks for all the input folks, all good stuff to hear.
