HO/OO Learning Curve inspired Cargo Car Chain

This product is my interpretation of the ubiquitous "Cargo Car" from Learning Curves Thomas & Friends Wooden Railway Toyline.  I grew up with these toys, and thought this would be a great way, in conjunction with my Sodor Lines Caboose products, to honor and update those childhood toys.  Several different loads are available for purchase including the small Sodor Cargo containers, a Fuel Tank, and the large Sodor Wooden Crates frequently included with these wagons.  Links to those products will be included below.  This particular iteration of this model does not feature the international Hook & Loop coupling system, instead being intended for the more realistic 3 loop and chain system.  All this model needs to be ready to roll is either a set of Hornby 14.1mm or HO scale 38" wheels.  

Links to Cargo Car Loads:
https://www.shapeways.com/product/MSQ8Z5229/ho-oo-cargo-car-small-wood-boxes-set-of-6?optionId=235994238&li=shops

https://www.shapeways.com/product/DNZC6DFQA/ho-oo-cargo-car-small-metal-boxes-set-of-6?optionId=235993701&li=shops

https://www.shapeways.com/product/2B9ZV9Y8W/ho-oo-cargo-car-large-metal-boxes-set-of-2?optionId=235993508&li=shops

https://www.shapeways.com/product/4PC9G8M64/ho-oo-cargo-car-large-fuel-tank-load?optionId=235992902&li=shops

https://www.shapeways.com/product/T33C3YRNR/ho-oo-cargo-car-large-open-boxes-set-of-2?optionId=235992756&li=shops

https://www.shapeways.com/product/XUVVGJ8NG/ho-oo-cargo-car-large-sealed-boxes-set-of-2?optionId=235992230&li=shops