I first tried to use my left hand for mousing when I decided that using the mouse far out past the num-pad wasn't ergonomic. It was okay for text/casual work bu

I first tried to use my left hand for mousing when I decided that using the mouse far out past the num-pad wasn't ergonomic. It was okay for text/casual work but not quite so good for fine/pixel-oriented work and I was painting some GUIs at the time. I also try using chopsticks left-handed occasionally which wasn't as hard to do as I thought it might be. When playing videogames, I still mouse with my right hand although my left hand is doing all the actions other than point/click--my right hand still has more accuracy. I have no idea how long it would take to develop that and haven't been trying. [Instead I use a custom keyboard layout making myself incompatible with standards.] Being able to use a computer differently is important, but now I think that most people could fall back to using the touch pad left-handed without much practice. Edit: I do remember a couple years back I had shooting pains up the back of my right hand for a number of days. I pretty much totally stopped typing/mousing. At work I paired as 'navigator' rather than 'driving'. I eased back into it, first using my left-hand for mousing. When everything seemed normal again, I eventually switched back to my right without much thought.