Don't get me wrong. I am listening but a bad batch of cams doesn't mean they were made in China. I thought he said he had a good source on the origin of manufacture? If it's true, it's a shame. I would find out who made them originally and try to get cams through them since BMW has (had?) about the best cams in the business IMO.
I have got NOTHING good to say about my experiences with Chinese bearings and whatnot. Junk right out of the box!