Mastering engineer at Optimal Media GmbH, formerly known as Optimal Media Production. Note: The company does not disclose the full names of their engineers. Other mastering engineers employed are BK (14), HL (2) (Heino Leja), KL (5), KR (3) and TW (5). When submitting credits & companies to a release that shows MK in the vinyl runouts, please: Add a credit: Lacquer Cut By - MK (11) Add a company: Lacquer Cut At - Optimal Media Production (only valid for releases until October 1, 2011) Add a company: Pressed By - Optimal Media Production (only valid for releases until October 1, 2011) Add a company: Lacquer Cut At - Optimal Media GmbH (only valid for releases after October 1, 2011) Add a company: Pressed By - Optimal Media GmbH (only valid for releases after October 1, 2011)