Thanks! The electronics were a bit more difficult to place than I had anticipated, but certainly still easier to do than on a dex410!
My main concern was getting the transponder in an out to swap it between cars, but it's really not that hard to get it in and out.
You're right, I did forget to post the most important part! Here's my machine with my car for scale. My goal is to figure out how to make enough money with it to support my RC addiction.
After I built it, I started milling better parts for it. Here's the re-designed z axis:
1/30/18 Edit: Reuploaded images to imgur. Screw photobucket.