For the band's 20th studio album, "Jekyll and Hyde," Furler handled production duties himself. With Weaver's departure, Furler played drums, while Gibson's departure meant Hartman would be Petra's full-time guitarist for the first time since 1994. Wade Jaynes, a studio bassist, also was tapped to perform in place of Bailey, at Furler's request. Furler, in particular, pushed Hartman to write heavier, riff-based songs along the lines of the title track, which Hartman had written before the decision to record Revival instead of a traditional album with original material.