qmk-dactyl-manuform-a/layouts/community/ortho_4x12/jackhumbert
..
config.h
keymap.c
readme.md

readme.md

Jack's Planck Keymap

Jack's Planck Keymap

Link to KLE of above image

Mostly standard Colemak, but the shift and symbol layers are influenced from BEAKL: https://ieants.cc/code/keyboard/beakl/

Unfortunately I haven't figured out a good way to adapt this to a 2u format yet.