Thanks Bob and Mike. Bob no worries
Exposure was the key concern with me and as I had minimal time for set up I went for a guess - not too long to get blur, but not too short to get nothing!
Worth a link to your fabulous image here to show what's possible:
http://www.iceinspace.com.au/forum/s...d.php?t=109560
New video added to the first post.
Cheers,
Tom