I don't care who's parts I use, they get checked, measured, rechecked, eyeballed, some more measuring, clearanced, and checked a couple more times..... I've seen some of these off shore built engine pieces that should never have made it through anything even resembling quality control......... Once it's put together and breaks, it's too late to do anything about it. Definitely worth the extra effort and time to check each and every piece over carefully!!!!!