I recently experienced a tear of some muscle of my left shoulder's rotator cuff and am unable to move my left hand up and down (mostly up) the neck of my bass while keeping my fingers over the fretboard. I have to go through a few gyrations to move my hand up the neck. Before I think about surgery (I had surgery on this same shoulder about 12 years ago and will repeat it reluctantly), I was wondering if any of you or anyone you know has successfully changed playing from either right or left handed to the opposite. I have only been playing for about 3 1/2 years (started at the ripe old age of 48 -- a midlife crisis thing I guess) so I don't have a huge amount of skills accumulated if that makes any difference in your advice. Thanks, Tim.