The Bwana Makuba speaks the truth! I shall be patient and start at the beginning of the journey!
I bought this one, Mike:-
http://cgi.ebay.com/1-25-adapter-Log...QQcmdZViewItem
It seems to almost come to focus. I'll set up at daytime on a distant TV antenna and work on it. The adapter is screwed in as far as it will go. If all else fails, I can trim off the flange which is sitting against the 1.25"-->2" adapter in the focusser. That will get me another mm or two which may well be enough. But it was going to come to focus easily with the 2x Barlow.
ps. What if I buy Bintel's focal reducer (
https://secure.attl.com.au/bintelshop/Stock/7458X.jpg ) and put that with the webcam - will I be able to come to focus? I'm suspecting not without some other changes?
Thanks
Eric