Spent a little while in the garage today. Found out that the cable adjusters I bought for the clutch cable are actually too small. However, I've swapped it for the throttle cable adjuster (which was for a thinner gauge) and it all seems OK. I got as far as reassembling the cable with all the connectors in the right order and regreased it. I've tidied up the fitting at the pedal end and although not ideal, it will suffice until something better comes along...