It’s blatantly self-destructive for me to be typing on a day when I have actual pain in hands, but I am very curious about whether or not swapping the shift key position with some thing that is more in the center of the keyboard will help. I noticed that a lot of my hand pain and arm pain is on on the outside towards the pinky near the abductor digiti minimi and on the ulna side of the arm, so that might be a sign that my pinky is overworked.