There was a thread on this somewhere on the build. Basically the trick is you need a fully isolated power supply to power the meters, so I have a 12V regulated supply, a 12V - 12V DC Isolator, and the meters. The meters are 0-30 VAC meters from eBay, but I can't seem to find similar meters nowadays. I also had to add track pickups to the two trucks. The car is an old beat-up Baby Ruth car, it was pretty sad so I gave it a quick paint job. If I ever get around to it, it'll get some graphics on the side to "finish" it.