Thanks Roger & Ian for your input.
Thankyou Brendan for all that info as well. Interesting! So they giveth, and then taken away...
A wannabe 2" focuser.
That was an interesting read and see he ended up getting it machined. I don't plan on doing photography as the guys were talking about in the link you gave me, but my concerns pretty much lay with my 2" barlow. Do I understand it is going to take longer to focus, and once it does, the image will be fine? Would there be any good reason why I shouldn't go ahead and get hubby to machine it (he is good at it)? Or might this come back and bite me later? Thanks Brendan, really appreciate your help so far. The bit I'm talking about isn't the 2" adaptor, but the actual focuser that's screwed on to the tube.