Late to the thread but this is a great discussion. I went through the same thing with a fairly tall board. I bought one of those squishy gel wrist rests first, and honestly it made things worse because I was just mashing my wrists down into it while typing. Switching to a firmer, lower rest that my palms only touched during pauses helped a lot, which lines up with what brisk said about it being a palm rest rather than a wrist rest. Also seconding the height point: dropping to a lower profile board did more for my comfort than any rest ever did.