Have been happily using mine for over a year and now that the hype is dead, I'm open sourcing it on my GitHub. Made a few adjustments on the model, edited my codes to more human legible form.
Valuable insights into the design of DES and other ergo keycap profiles in general -- by @Pseudoku3 himself. Day #18 of the kbd.news advent calendar:
kbd.news/On-the-DES-key…