 He was one of the original members of Fukkeduk with Niek Roseeuw, Kristof Roseeuw, Tom Dewulf, Jan Kuijken, Rik Verstrepen, Frank Gijsels, and also the Gerard Van Dongen Kwintet with Joe Williamson, Tom Wouters, Henk Bakker.He was in KAMIKAZE, with Tom Wouters, Filip Wauters, Kristof Roseeuw, also in X-Legged Sally with Peter Vermeersch, Pierre Vervloesem, Danny Van Hoeck, Pol Belgrado and Jean-luc Plouvier and later Peter Van Den Berghe.Maris joined Think of One, with Roel Poriau, Erik Morel, Tobe Wouters, Thomas Desmedt, David Bové and the Flat Earth Society.