The keyboard is designed around:

1. The most common letters used (home row is R, T, N, and S)
2. Relationships between sounds (D is common and closest to T and same with L and R)
3. The shape of a left hand (follows the natural curve of the fingers)
4. Practicality (without memorizing obscure layouts, you have access to arrow keys, function keys, etc)

The layout derivation is documented on the GitHub repo (although I forget "C" and Backspace originally lol):

   f7 f8 f9 f0 fL fT
[  ]
;  '     4  /    |In Hm PU
,  .  3  J  5  BS|Dl Ed PD
1  2  X  D  M  6
`  W  G  T  N  C  \
CL H  L  F  P  S  7______
Tb K_ R  V  B__Z_|A  8  9
Sf|Up|___  |Al Y  E  I  0
←  Dw → |  |Wn Cl Sp O  U
               Rn -  =  Q


Thank you to PCB Way for providing the boards in this builld. They did a great job.

PCBWay is a website where you can order circuit boards to be manufactured for you, and they have great tools for everyone from businesses to hobbyists like me.
They provide you all the options you need to make sure your PCB turns out just the way you want from color to materials to layer size; everything you'd expect.

They even have a nice viewer for seeing exactly how your boards will turn out.
They also did assembly for me, perfectly placing surface-mount components that I would've struggled to do by hand.

This is a pretty large and unusual board, so I'm grateful for their help getting it manufactured!