I'm kind of on the same page here, except for me it's more of an issue of morals rather than quality control. There's plenty of stuff in O scale/gauge that I love, which also happens to be made in China, Korea or something like that. My problem is mainly supporting a company that was willing to cut costs by shipping jobs oversea, thus ridding people here of their jobs, or any potential work they could've gotten, like some of you guys said. Not only that, but I've heard that the workers in factories in Asia can be treated poorly, and so I kind of feel like a jerk for supporting businesses that are okay with working with subcontractors that may do that. Of course there were American workers in the past and probably now that have been treated poorly and worked in overly-dangerous conditions, so maybe I shouldn't just single out countries in Asia for doing that.
I don't know if I am saying the right words, but I definitely understand some of the issues that are being said here. As far as I know, the last well-known O scale train manufacturer that had a good portion of their stuff being made in the US was Weaver, but they are gone, and so far the only recent thing we have of them is apparently LionScale. As much as I hate to say it, I too highly doubt that model trains in general will come back to America when it comes to production. At least not anytime in the near future. And in general we rely so much on stuff that is made in foreign countries that I can't even imagine model trains of all things being among the first things to start mainly being produced in America again.
As for quality, so far I've pretty much had no major issues with the stuff I have, regardless of manufacturer or where it was made. I think the biggest issue I've had was one of my MTH PS1 engines having a glitch in the motherboard that prevented the locomotive from running properly. Not only that, but the motherboard itself would start smoking as soon as I turned it on (and no, it doesn't have a smoke unit 
). Other than that, the other MTH locomotives I have so far (which are mostly used PS1 because I don't make that much money) seem to work fine. If these were flat-out Chinese-designed and Chinese-made products, like some KO's you see of other types of products besides model trains, I wouldn't touch them with a ten-foot pole, because more than likely they will be poor-quality. But so far, aside from some bugs, I've yet to come across straight-up poor quality O scale equipment made in other countries. I am sorry to hear that some of you guys have had to send stuff back several times; I think that really stinks. And I also agree that Pre-War and Post-War trains will probably outlast all of this modern stuff, lol.
