OK wrestled with RSI/OOS for years.  I think I mainly screwed up my right hand (especially) almost permanently with a really bad numeric stiff keyboard doing a data entry job in my early 20's for 18 months.  I  manage pain etc with ergonomic everything:  WorkPace software to enforce micro and rest breaks.  Alternate use of mouse with right and left hand.  Gell pads, Goldtouch split keyboard, you name it!  Also have back pain so use of adjustable desk, knealing at desk, standing desk even a treadmill desk I hired for about 18 months! 

I work from home.  Obviously change of career could be one thing (but what doesn't use a PC anyway these days and would have to be usually in someones office with not ideal setup).

It's not too bad in that my wireless Microsoft mouse I've had for years is by some fluke of nature very soft to click in the left finger.  Unfortunately it's semi-died finally (dreaded that moment for a while). 

Need a suggestion for a quality mouse, but most importantly a click pressure that is light (Google had to find any mention of this, gaming mouses often want harder pressure!)  I personally find that lighter makes a huge difference...if I help someone on their PC, only a few mins later pain is heaps worse with their standard mouse!

Ideally would be suitable for left of right hand use but I can live with an alternative on the left.

Came across this, expensive and adjustable, but not sure if on the lightest setting it's actually light enough?  Anyone know what standard mouse click pressure is??!