Thanks guys! That's the problem, I did indeed have the extra adapter in. I did think maybe that both shouldn't be in there, but thought that the 1.25" wouldn't fit without the 2", don't know why I didn't try though.
Ahh, so damn happy now. Knew it was user error, and not a faulty product. I'll be outside for the rest of the night now!
Thanks to that problem, I think I've mastered collimation..
Thanks again.
Damien