Cheers Martin.
I was going to upgrade my mount to get my newt singing at 1m focal length, but thought that constraining myself to stuff that will ride on the HEQ5 might help to curb upgradeitis, for a while at least! 740mm, or 770mm with flattener, and the zwo 1600 is pretty much bang on 1" per pixel, like an F4 8" imaging newt.... just a hell of a lot slower
I moved onto NGC300 the next night for three-and-a-bit hours. THAT is a faint one for my set up! Will have to wait til next new moon to keep chugging there... could be a real epic!