I came across some Athearn 20' chassis kits.I made some 20'ers then wanted to make some 3 axle trailers I had seen.The trailers that I saw could haul 1 40' 2 20' or a single 20' in the center.
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ModelRailroadBookstore.com - An online model railroad bookstore featuring a curated selection of new and used books. Layout design, track plans, scenery and structure building, wiring, DCC, Tinplate, Toy Trains, Price Guides and more.