Long time reader, first time poster. It's been said many times here but I'm a huge fan of the Teensy series -- Paul, thanks for your continued hard work.
I thought you folks may get a kick out of a recent late-night tedious side project. I picked up an MKL04 and a MK20DX256VLH7 (along with a few support components) and put together this absolutely worthless piece of circuit trash:

The white LED... it's on because I was able to load a simple blink sketch, and managed to snap a single photograph of the circuit before it glitched out (and hasn't worked for more than a fraction of a second since). Turns out the already sensitive 16 MHz crystal really doesn't like free-air soldering sans ground plane. But yeah, it's officially possible to build a barely functional Teensy 3.2 clone without a slab of FR4.
I thought you folks may get a kick out of a recent late-night tedious side project. I picked up an MKL04 and a MK20DX256VLH7 (along with a few support components) and put together this absolutely worthless piece of circuit trash:

The white LED... it's on because I was able to load a simple blink sketch, and managed to snap a single photograph of the circuit before it glitched out (and hasn't worked for more than a fraction of a second since). Turns out the already sensitive 16 MHz crystal really doesn't like free-air soldering sans ground plane. But yeah, it's officially possible to build a barely functional Teensy 3.2 clone without a slab of FR4.