[alistairsam]

Hi Rick
Yes, now that my star elongation issues are sorted, I'll be aiming for 20 to 40 min subs with both the 8"F4 and 10"F4. The OSC requires much longer exposures in Ha, but the F4 helps reduce that time.
That and I will try and learn Ha blending with rgb data that I aim to get from dark skies. Not that easily done with the current weather.
I did a 20 min sub of ngc2476 but it was quite small in the FOV of the 8 inch. I was however very pleased to see that my PA was quite good and stars round to the edge.
I tried out the eqascom script for the ccd pa method and it works very well. No need to hold down the e/w button.

Cheers