Comment by PAPPPmAc

I have a long fascination with weird input devices, owing partly to a predisposition to fine joint problems, and Chorders are always both super interesting in theory and kind of weird in practice, going all the way back to the Engelbart/SRI 5-key Keyset that was carried forward to the Alto.

Of the ones I've played with, I find the 7-key kind (4 fingers and 3 thumb positions) to be the most appealing, and I don't see them mentioned in the thread. Infogrip has sadly discontinued their commercial BAT offering, the "Spiffchorder" family ( https://www.chorder.org/wiki/doku.php/start ) use the same chord-set and are designed to be cheap and easy construction - I've made a few in different physical arrangements. I'm too qwerty habituated and never got _completely_ comfortable, but I've been up to tolerable a couple times.

My "normal" typing is mostly on conventional splits (Kinesis makes make some nice off-the-shelf options that just split and tent), largely to avoid shoulder issues. I recently tried a ortholinear split and... I'm pretty convinced they really don't have meaningful benefits.