He believes Dirkschneider retains some ill feelings about their last stint together, and as a result he won't take part in their Acceptology project. The singer formed the German metal outfit alongside Hoffman in 1976 then left in 1987.

He returned in 1992 after the band had split three years previously and recorded three more albums before leaving when they split again in 2005. When Hoffman got them back together in 2009 he declined to return and was replaced by Mark Tornillo.