My layout using the winkeyless b.face X2 PCB.
pip install --user qmk
qmk setup
qmk flash -kb winkeyless/bface -km p3lim
The keys indicated with a gray color in the image above was not supported by the layout so a custom matrix was made. The two additional keys were on pins 22+41 and 22+42, C3+B1 and C3+B2, which is mapped to col 10 row 1 and col 10 row 2 in the matrix.