Thanks Phil,

I've got around that issue already with a smaller clamp as you suggest and I'm not going for bar end shifters as want a complete shimano 600 arabesque groupset on this bike.

I'll rephrase, when steering right or left the stem obviously rotates and the tension on the gear cable alters. How do you stop the gears changing as a result of this change in tension? Or is it not normally a problem?

Cheers