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Thanks Mariusz, Yes I'm happy to be able to get 15mins subs. I do spend a lot of time drift aligning using my ccd. I find a star start imaging it then move the mount with the arrow keys 15sec left then 15secs west, have a look at the image. If the star trail forms a "v" I then adjust the ALT or AZ. depending on where the star I'm using is. Then I will do this again until I get a straight line then I increase the exposure time and do it all again. I do this working my way up to 10min exposures. This is the easiest method I have found, but probably the slowest.
Cheers.
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