Quick update...
New parts have arrived. I have a new mainboard with more RAM and IO. Should be able to control up to 6 things in the car now. I received some feedback to have it change auto-hold, and thought that someone out there might want it to change traction control. Those are options, but I haven't written the code yet.
Also, a new daughter board that has all of the transistors on it. Originally, I used a large bread board. The daughter board is way more compact, allows for stacking with the other boards (for packaging in a case later), and it has a removable plug on it. That means you can simply unplug it for dealer visits.
In the coming weeks, a 3D printed case should be on its way.
Finally, if anyone has a contact in Korea that can get parts from a Korean parts manufacturer, that would be awesome. To make this thing plug and play, I need KM025B series connectors from the company Hirose. Those are the connectors that Kia used to build part (the part that is important to this) of the wiring harness.
Drew