Thanks for that - just had a last look and although for the life of me I could'nt actually see any movement - when I adjusted the B screw, after checking it was engaging the tab, I could hear a faint 'rumble' as I turned the crank - I assume this was the jockey wheel rubbing on the big ring - as I eased it back the noise disappeared and there is a healthy gap between jockey and ring. I've had it on the stand (£11.99 -
Halfords 
) and been running it up and down the cassette in all 3 chainrings and it changes pretty slickly - just got to get it out on the road for some more strenous testing...but have you seen the piggin weather?

but thanks again all - the video tute was very helpful too.
I think you all deserve a
Edit -I been out up and down the road and the changing was perfick - obviously yet to really 'load' the chain - I'll be doing that tomorrow on the Sherbrook trail, but all seems good.
Ps Lulubel - still looking at bikes and I can see why you had a Cube - some fantastic deals around just now on 2012 models over here and the spec looks really good on all of 'em. Trying to persuade a dealer to give me 0% on a sale bike but the beggars are'nt having it, well, 6 months is the best so far on a £1,000 bike - I think Mrs Zulu would have something to say on the £150 a month going out of the account!
