Yes that's right and a well documented problem on here.
Solution is to use some teflon sleeving over the cable to protect the frame, Transfil do a cable kit.
is it i had a quick look but couldent see any threads,
yeah that was my idea or make a spacer to go under the plastic guide on the bb to lift it up a bit ?
ps i think i may have ridden with you the other week at cannoc ?