Hi Tony
An excellent start to your cooled B&W ccd imaging career. I started off with an ST5 with a meagre 320x240 pixels.
How are you focusing? Are you using CCDSoft, manually, or an external focuser? The stars looked slightly off focus on my monitor.
If you would like me to drop round one evening, I would be happy to join you in the Tardis, as I have been using CCDSoft V5 for 4 or 5 years now.
Cheers
Dennis