I ran my first prototype of the MEGA board back in early 2020, and I'm just now getting back to the project. Here it is, the FortyTwo Systems MEGA:

I got pretty excited to see it all built out like this. It has one fatal flaw, which is easily corrected: I accidentally crossed the SWCLK and SWDIO lines on the JTAG SWD header. With some custom cable magic that flaw was easily fixed, and I'll correct the problem in the next revision.

Now it's time to start writing an Arduino core for this board, currently it is only programmable from Microchip START.