Complex sentence: Hetherington was temporarily replaced for the tour's duration by Gordy Forman of Frenzal Rhomb until Shane Wakker of the band Channel 3 and dance troop named' The Nazi Synthesizers'.
Split into simpler sentences: Hetherington was temporarily replaced for the tour's duration by Gordy Forman of Frenzal Rhomb. The roll was then filled by Shane Wakker of the band Channel 3 and dance troop named' The Nazi Synthesizers'.