Campbell's final gig with National Health resulted in a total discouragement with rock music, and in subsequent years he would abandon the genre altogether, describing it as having "very limited powers of expression... a rather fixed, limited stratum of musical experience, and one that I no longer feel particularly drawn to." In 1977, he dropped his old school nickname of "Mont" in favour of "Dirk" and formed the two-guitar, flute and violin quartet Mozaic, which mostly played "pleasant, undemanding" Campbell pieces at weddings and social events. He also recorded an (ultimately unreleased) tape of other compositions, called "Individual Extracts".