Yah, Athearn made most of the major JD's, but the prototype manufactures are under represented. If I had the time/money/space, I figure I'd be much happier to buy American Flyer S gauge 1:64 trains, and then I could find just about any brand and model of tractor made, if I just watch eBay long enough. It always strikes me as ironic--Ertl makes 1:64 and 1:16 tractors, but in the model train world 1:87 and 1:48 are arguably your top two sizes, and I'd argue 1:160 has greater sales than 1:64. And 1:16? I'm not even sure there are ready to run trains in that size.