I use a Kinesis Advantage keyboard. You can freely remap the keys at the hardware level. You also get to put control and meta under your thumbs, and you get mir

I use a Kinesis Advantage keyboard. You can freely remap the keys at the hardware level. You also get to put control and meta under your thumbs, and you get mirrored versions of these keys under each thumb. I find it a lot less painful. There is a learning curve, though, and your coworkers will occasionally try to use your computer and get horrified. Note also that all the other postural changes that you can try might wind up being as important. Get a keyboard support that can be adjusted to arbitrary heights. Get a decent chair.