 He performed and recorded with Tully and their successors, Luke's Walnut, throughout the two years he played in "Hair".In 1970 he re-joined the Burrows group, this time for Expo 1970 in Osaka, Japan.In the 1970s Sangster released a series of popular "The Lord of the Rings" inspired albums that started with "The Hobbit Suite" in 1973.