Just re-read my original post and I AM knocking 1 off the front as suggested (748s is 14 tooth as standard).........
Anyway, I take the point that a 13 is too stressful on the chain - looks like I missed the opportunity when I had the new set put on.
Soooooo, anyone want a 13 toother FOC? Give me a shout.
P.S. Can anyone enlighten me why I can't get the original off????? Not that I need to now anyway.
Cheers
Jacko.