Hi there !
You don't know me because I'm not an active member and I haven't posted for years, but let me introduce you to Okey65, my ortholinear keyboard which is the evolution of my hand-wired keyboard that I been using for several years.
It features one more column than the Preonic and an atypical layout.
It consists of a pcb with the classic atmega32u4 and a usb type C connector, 2 plates of fr4 and an SLA resin frame, fully dampened by EVA foam.
I put Gateron Pro Milky Yellow switches in it and reused my dsa keyset from Signature Plastics, and I'm very happy with the result, apart from the lock key indicator LEDs that don't work.
If you want to know more and maybe build your own
https://github.com/kiks64/OKey65 but keep in mind this is my first electronic design