I am looking for ways to ease the pain I experience changing gear on my Dawes bike. It has Shimano XT Rapidfire changers. I have arthritis in both thumbs and some days I grit my teeth just at the thought of the next gear change! I came across electronic shifters the other day and they look as if they could be the answer. I was looking at the Xshifter but I know there are others. I would appreciate comments from anyone who has experience of this type of shifter system; I'd also be glad to hear from anyone about alternative solutions to my problem. At least I have my Thorn Sterling with its Rohloff twist shifter for most of my rides at the moment.