Here’s the Trkey Macro — built on a Pico or Pico W with a little screen and 10 Cherry MX switches. 

One switch handles layer switching, and the other nine are fully mappable for whatever shortcuts you need.

The 9 black caps you see are custom infill keycaps from Printzee. Definitely worth checking out (we don’t include the keycaps ourselves).

You can find the project and all the code on my GitHub.