Complex sentence: Impressed, Watchorn helped him find Mike Dyball and Vince Nudo to complete the line-up, and their first jam session resulted in a new song, which Heppner took as a sign that he had found the right band members.
Split into simpler sentences: Impressed, Watchorn helped him find Mike Dyball and Vince Nudo to complete the line-up. Nudo was the last one to join the band, and their first jam session resulted in a new song, which Heppner took as a sign that he had found the right band members.