I wanted to build some log cars...for lack of a better description. I've seen reference to 'bunk' cars, but that doesn't turn up much in a search. I finally found Hartford Products who have some nice looking, if not pricey, kits. However, I have a lot more time than $ and would like to scratch build some. So, while I can find a lot of pictures, I haven't found any plans, blueprints, drawings, or even closeup pics. The style I like are those with main timber frame and the cross members over the trucks. The cross pieces either have a channel or are built up 'U' shaped. The appear to have movable chocks with the chain resting in the channel.....or so I think. The link and pin couplers are neat, and I found those on the Qzark site.