Here is my interpretation of the upper deck framing. (7086 graciously gave up it's roof to ease installation, and will now be renumbered)

The styrene was painted black with an overspray of Grey, as I doubt the framing was painted, and it is in the shadows anyway.

A brilliant idea--if I do say so myself--is flat sheep. These are a silhouette of the animals to create the appearance of a loaded car, and without the weight or cost of 3-dimensional model sheep.

Mine are based on Railmaster sheep, which are from New Zealand, and thus as Chris pointed out, seem to be larger than the South Park species.

The flat sheep don't take up much space, are light weight and at an angle fill up the car. Now for a break before I add some bedding and the upper deck.

I didn't add the whole upper deck: the floor on the end is less visible.

The Agent is reviewing the completed installation, including animals and bedding.
Keith Hayes
Leadville in Sn3