Too cloudy again toinght. This is a pity as I have come up with a couple of possible solutions to my focusing problems - one involves a LOT of red cellophane, the other is more oldschool ... will let you all know more as I try them.
I would just like to put in a wee plug for Sellarium - lives here http://www.stellarium.org/ - awesome freeware planetarium software for your pc or mac.... very cool way of finding things in the sky before you go outside and freeze! Big thanks again to Andrew at the AAS for putting me onto it.
I will also be trying to do some more frame stacking work next time I shoot stuff - I'm planning to use the moon, as it's bright and easy to film. I will be using RegiStax to do it - good reason to learn the program and my early tests came out ok. Pity my camera only does 640x480, but it will be good enough for a test.