Agreed, like Bat says, you should have a look at your ergonomics too. But another common cause of RSI is too much working of a small portion of the range of motion, which was why I suggested range-extending exercises.
Les, you really do want to get this knocked without surgery -- necessary sometimes but the ultimate outcome is never as good as if you can avoid it. Like Bat Goddess said.
Richard! LOL! but the J and U keys are under his right hand.
-Glenn