Long time no post. Been busy upgrading from Teensy 3.2 to a Teensy 4.0. The 4.0 tries to be pin compatible with the 3.2 and so far everything has worked electrically. It took a while for all the c libraries used to catch up. The work was worth it. The Teensy 4.0 is like a buzz-saw in comparison.
I've been finding out about the strength limits of 3D printed PLA parts. I have tried mounting the vertical array and broke the connectors for the bike rack. Back to the drawing board.