Was so happy with dealing with Andreas that I purchased my replacement Jim Wolf C3 cams through him. When my car threw a rocker arm during racing at Memphis in Feb, he helped walked me through diagnosis and repair. With some polishing on the cam bearing journals, some modified rocker arm shims, a replacement rocker arm and the new cams i was back in business and brought home two NASA PTD 1st place wins at NOLA this weekend. Thanks again for your support and fast shipment.