This project is based around the Teensy 3.2, which has some I/O that is only accessible via tiny pads on the bottom of the board. I created the Megsy project to make it easier to access those pads. Although there is an official expanded board available via OSHPark, it lacks a full bill of materials, and requires a lot of surface mount soldering, which I've no experience with.

So I finally ordered some PCBs for Megsy and they came in today. The full story is on the Megsy project log here:
https://hackaday.io/project/11367-megsy-a-homebrew-teensy-3/log/40826-first-pcbs-have-arrived