Anyone have any problems with using a non-OEM camshaft in the BRM? I ordered what I thought were OEM followers and camshaft from one of our respected online vendors, however I received the German made black lifters (not OEM), and a camshaft that is made somewhere I hope in Europe. I ordered these too quickly I guess without reading the rest of their description - I saw the OEM part numbers, added them to my cart, and click...on their way. I really wanted all OEM parts, should I return or sell these and go with VW parts or should these be fine for the next 95k miles?