Cool, thanks! I'll do a little practice and then jump in to immersion at the start of my next vacation then. I just tried a little using an onscreen keyboard as a cheat, and it doesn't really feel all that different from learning chorded keyboard.

At least for me, I the sense of physical fatigue is about the stress of dealing with the higher degrees of freedom on a regular keyboard together with the location memory task. But needing a chorded keyboard seems like a bridge to far in a work environment.