It's a good thing to do, if you can get your brain to rewire itself. When I had wrist issues years back, I switched the mouse to the left side, and it took a couple of weeks to become productive again with it there.

But that has long since paid many dividends. At some point I moved it back to the right hand, and then last year moved it back to the left again when I developed "hockey elbow" on the right. Now this summer I've got a left-side injury, so the mouse is back on the right again for a while.

At this point, I'm about equally good on either side, and very happy that I managed to adapt to doing this years ago.

Cheers