Well, the truth of the matter is that this problem is not unique to EVO engines, I will bet the same thing has happened to just about every kind and type of engine that has ever been made in large quantity. You might have been unlucky enough to get an engine that flew past the parts washer guy as he sneezed. Some brands might be more prone to this sort of thing than others. You can wash the individual parts all you want, but once everything has been assembled and sloughed off thread material is forced out of where it was hiding, how many manufacturers should be expected to break the engine down to reinspect everything and assemble the engine a second time? That's why many guys advocate that it is up to the end user to do the final inspection and cleaning.