I developed this layout after playing around with Ergo layouts on KLA for a while.
The design for my Programmer's Keyboard featured thumbkeys, so I was trying to see if E or T or both were better on the thumbs.
Turns out, neither were, but H was.
So that resulted in this. It does okay in English, but badly with the techinical tests. But as I say, it was an early design developed with English tests, and I've learned a lot since then. So consider it experimental, and open to improvement.
Download the KLA .json file
Click image for larger view