Conversation so far:
What were some significant line up changes for Helloween?
Helloween parted ways with guitarist Roland Grapow and drummer Uli Kusch.
Who were Roland Grapow and Uli Kusch replaced with in Helloween?
They were replaced by guitarist Sascha Gerstner and drummer Mark Cross.

Question: Was there tension between the members of the band?
Self-contained rewrite: Was there tension between the members of the band Helloween when Roland Grapow and Uli Kusch left?