This is my personal layout for the Preonic keyboard from OLKB.
I built it using the QMK configurator based on the default layout.
I have the OLKB-60 model, which I bought through Massdrop in the drop which shipped in February 2018. It uses revision 2 of the firmware.
The keycaps are the XDA Canvas Betas with icon modifiers. These were part of the same drop. Supposedly there were issues with the printing of those caps, so they rereleased a fixed set, but I prefer the original, chunkier lines so I kept those.