With the underframe mostly completed, I could now install the trucks. I first used a tap to tap the hole for 2-56 screws.

I could then install the truck. The truck is just a stand-in until Jim King produces the correct truck for this car (if ever!).

And here's the car on the track.

I gathered up all the parts that would eventually make up the one car and put them on a digital scale. For the length of the car, it came up about one half of an ounce too light. I then broke off and installed two 1/4oz weights to the ends of the inside of the bottom of the car. That should minimize their visibility should I model the car with the doors open. It now measures the correct weight.