Thanks Richard, every image i take gets better, so by that logic M104 should be good.
the good thing is that i haven't had to go to the observatory for 3 weeks
hopefully the trips will become much rarer as the reliability of the whole set-up improves.
i look forward to your first light, looks like it will be one heck of a performer. Sometimes i think that it would have been better to go down the refractor route, the shorter FL makes stars seem sharper and tracking less of an issue, but i really wanted to shoot galaxies