Yes, this is actually what lead me to the CharaChorder! The data hand seems superior for single letter entry, but the CharaChorder has a type of chording built in to the firmware. I imagine sticking their chording engine in the DataHand would be incredible.
jesusfreke has a 3d printed version of this on github: https://github.com/JesusFreke/lalboard
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Searching split keyboards on google image search for long enough found it: https://en.wikipedia.org/wiki/DataHand#/media/File:DataHand_...