Control in Caps Lock is only a small improvement for emacs users. The best option is to put a little pad in the control keys and use your palms to hit it:
https://www.reddit.com/r/emacs/comments/7zvw2b/my_weapon_aga...
https://www.reddit.com/r/emacs/comments/7zvw2b/my_weapon_aga...
https://images-na.ssl-images-amazon.com/images/I/61Uvir1H0AL...
What did work very well was taking a Kinesis Freestyle [1] (two completely separate keyboard halves attached with a cable) and mounting the left side to a hobbyist vise [2]. I removed the vise (clamping part) and kept the base. Then I made an adapter plate (plywood) that allowed me to mount the left half on the base. Then I could position that half at any angle and rotation I wanted. This probably got me typing again four weeks earlier.
[1] https://kinesis-ergo.com/shop/freestyle2-for-pc-us/
[2] https://www.harborfreight.com/2-3-4-quarter-inch-articulated...
I no longer live in Emacs like I did for the first half of my previous job, but so far (touch wood!) I have avoided RSI by just remapping Caps Lock to Ctrl.