Thanks Phil and Matt .... I tried to do some 8 minutes exposures last night but I don't know how they came out yet. Dew caused problems again so I have to get heaters sorted out before I can do an all nighter and possibly get some better results, I don't like the thought of a hair dryer blowing across that expensive piece of glass. The results so far are encouraging. The scope only weighs 6.5kgs plus another couple for Field Flattener and ST2000XCM so it seems to guide very smoothly on the EQ6. My 254mm Newt being 15kgs by itself makes audible clicking sounds as it corrects, probably just backlash in the mount, doesn't affect images and at least I can tell when it's guiding. The Apo just sits there quietly doing it's thing apart from the fan noise of the SBIG.
Cheers
