It's been a productive night. I've got the first production ish board completed.
While this one does work, there are a few things that are off. I didn't have 3 of the SMT resistor values I needed, so I substituted thru-hole. I also had to use headers to mount the STM32, making it sit much higher than a
final board would.
Overall I'm pretty pleased.
I'll try to slap it in an enclosure and install it in the 4Runner tomorrow. I'll take pictures of the install and videos of it working.