Actually I did try the natural 4000 couple of months back (when I didn't have much pain) but somehow I wasn't very fond of it. I found the keys, particularly the spacebar, more stiff than my current keyboard. For the modifier keys, I use the lower part of my palm but due to curved nature of those on 4000, it wasnt pleasant. With the split design and the fact you can have negative tilt, perhaps my wrists will be in a better position. My fingers, especially left ring finger, and the dorsal side between knuckles and wrist, also hurt actually. So I presume a mech keyboard will reduce some strain on the fingers. for the dorsal side, I think negative tilting of the keyboard will help.
ergodox yes please!..but not now. I already ordered a quick fire rapid.
Now I need to figure out how to accomplish this negative tilt without incurring additional costs. any ideas? For now, I put my wallet beneath the keyboard and not resting my wrist on the table. There are lot of coins in there, so it gives a good tilt. My dorsal part feels better.