Well you can be pretty happy with that Nick.
When I was your age (in 1985) I would have been over the moon to see an image like that come out of my cold camera wnd Celestron 5 mounted on the Oddie refractor at Mt Stromlo
Here is my setup I used ahen I was 16/17 years old:
http://www.pbase.com/strongmanmike2002/image/73602890
That's the Oddie at Mt Stromlo it is mounted on, unfortnately lost in the fires of 2003
The vacume for the cold camera was created using an old fridge compressor from the local tip
