Last year, I programmed a Sensel Morph to use it like a Linnstrument but with the Jankó keyboard layout.
I initially tried the Linnstrument layout (among other isomorphic keyboards), but I felt the chords were unergonomic. Yes, the keys are technically closer together, but the vertical positioning means you have to twist your hands and contort your fingers in unnatural positions compared to playing chords on a traditional piano.
I settled on the Jankó keyboard because it’s isomorphic but also ergonomic. Like on a piano, your hand can remain neutral and untwisted while playing any chord. And, since there are multiple rows with the same keys, you have a choice for which row would be most comfortable for each finger (this happens by default on a piano since keys are vertical blocks).
Also, because of how the layout is isomorphic and 1-dimensional, we can easily do chord slides that would be difficult on other continuous instruments like the continuum, linnstrument, and seaboard:
I programmed it with the API because afaik the overlay creator doesn’t have the snap-to-key feature like on a Linnstrument.
I carved out the overlay out of adhesive foam. Adhesive foam is good for prototyping but gets unreliable over time, so I need to look into making a proper silicone overlay.