So I printed out 2 Tetent T's and a Turntable and have been getting a feel for where the concept ergonomics are at. 

What I've already done:

• Moved the thumb trackpad. 
  • I feel like I've almost got the right location which would be directly underneath the gap between the 3rd and 4th switches on the thumb row.
• I've experimented with curved faced switches (curve is an extrude cut along the X axis) but I think I'll keep a flat face.
• Moved the material around the switch faces down so that the switch face is 0.5mm above the surface.
  • This does increase fingernails catching inbetween the switches, but it also feels like the switches are slightly more distinguishable and easier to press.

What I am planning to do:

• I'm wondering if I should add a 6th switch in the center column (3rd digit)
  • This depends on if I could get a 2mm dowel long enough (but might be irrelevant due to the next point)
  • If this implementation is successfull
    • an aditional 242 chords could be performed. 
    • the keybinding could be such that something like 555 has all fingers physically in the same row. This might be more mentally processable to Future Me or some people than having 555 be where the fingers naturally land, with the 3rd digit 1 row higher than the 2nd and 4th digits.
• The spacing between fingers is too close
  • I was wondering why digits 2 and 4 never really seemed to mesh all that well with the keys, especially 4.
    • I was thinking of slanting the faces of the top-side columns so that they're better aligned with the fingertips, which I will still implement.
  • This is going to have some downstream issues when I rectify the distancing, but it might also allow for a lower switch height or less dowels needed if I can put them in the free space I'd gain inbetween columns.
    • This could also have implications with Tetent Tiny, but it might be fine as the hold is different and the 3 fingertips are closer together the smaller the arc created by the fingers.
• The thumb column needs to move down slightly.
• [Turntable] The joystics need to be flush with the switches on the same row.
• Some kind of hinge clip mechanism is needed so that the Turntable can be held adjacent to a Tetent T
  • The angle needs to be adjustable so that my elbow only needs to rotate to move from one to the other.
  • This also reduces the amount of clamps I need to carry with Teti down to 2. 
• Implement a quick removable battery