As far as manufacturing goes, there are more than 3 plants making tracks worldwide, and while no construction tracks are made in the USA, Camoplast does make some AG tracks in the US. I know of active plants in China, Korea, Sri Lanka, Thailand, Poland and the US. Camoplast bought Solideal a few months ago and they are still sorting that all out. As for OEM vs original, since companies like Solideal make a lot of the manufacturers tracks, but stamp them with the brand of the machine name, its hard sometimes to know whose tracks you are buying, but I agree with the one guy who talked about the no BS warranty, that's where the rubber meets the road, pun intended. We buy our tracks for our rental business from a dealer who we know is trustworthy and who has helped us out with a couple of warranty returns and we've had no problems. I would recommend everyone find such a dealer and build a relationship, shopping around and buying off ebay is like shooting in the dark, you never know what you're going to get. If you've got a real person, who isn't some guy sitting in a trailer in the desert surrounded by containers of tracks they bought direct from China, you're going to be better off, even if it costs an extra 5-10%. Better to buy a track with a 1000 hour no BS warranty than to buy two sets of slightly cheaper tracks that only last 600 hours. Just my humble opinion.