Well, the new cables have finally arrived, and so now to replace the old ones. Looking on the internet, every site seems to give a different method to replace the cables, or else such generalised instructions that I could have easily written them myself. I've removed the small triangular piece of plastic (one cross head screw) by the adjuster barrel, but this doesn't give access. Next, I've pulled off the handlebar grips, and then slid out the rotating part off the gripshift. Here I can see the cable running in a groove around the twist mechanism, before disappearing into a grease filled port in the static part. I've tried pushing slack cable in, to try to free the head of the cable, without success. I'm frightened of doing anything that I can't undo, since it could leave me without a bike for ages. Anyone with experience of what is probably the original gripshift?