Cherry ML "Planck"Custom keyboard with Cherry ML switches. The switches and keycaps were harvested from two different keyboards. The orthogonal PLUM keyboard and a Cherry G84-5500LPMEU-2.
The PLUM keyboard is a long discontinued model. You can still find them in unused condition on eBay. The Cherry is an obsolete PS2 model that can be found for under $20 on Amazon.
The is powered by a Pro Micro. The matrix is identical to a GNAP! without the LED matrix.
Revised 1.1 version here.
laser foaming. The prongs have small nubs that click the keycap into place in the switch. These feel much more secure than the PLUM ones.