Comment by cryptonector

> And I personally found having anything actually on my lap required constant stress to balance it during use including from my hands themselves while typing and counterbalancing…

Your anatomy and the height of the chair that is comfortable for you may be conspiring against you being able to put a keyboard on your lap, yeah.

> mounting the keyboard halves to my chair arms or using sturdy tripods from the floor with a lounge chair etc helped me tremendously.

I no longer use a chair. I either use a kneeling chair or a big exercise ball. But when I used chairs I always removed the arm rests because invariably I would rest either my elbows or forearms on the arm rests, and in ways that pressed on the tendons.