Simplified A-scale Bettendorf Truck

This is heavily based off of the AristoCraft Bettendorf freight truck. I originally modeled this in 1:29th scale with the express purpose of taking it up to 1:20 scale but here are the files at normal size for anyone interested in a sprung freight truck for their 45mm trains.

Kadee coupler centering springs, or some smaller ball-point pen springs, and 1/8x1/4" flanged ball bearings work well to complete the design.