Thanks for your input drystonepaul that's the decision made regarding the derailleur then, I will clean it up and pop it back on.
I think i will be pinching the XT brakes though.
I am still after fitting the CODA 500 wheels if there's no reason why they won't go on,(including the cassette for ease) mainly from a looks point of view as they are both the same colour for a start!
Are they better or worse spec, out of interest?
I want to fit just the one ring at the front as I don't tend to use the other two and also the trigger shifter is broken so I may as well just do away with it altogether.
Can anyone suggest exactly what sprocket etc I would need to achieve this please?
I know what you mean about the green colour, its not a million miles away at all, and thanks for the tip about a new chain, that's saved me from potentially wondering what the hell I had done wrong!