Radon released the "Death City" single in 1999, and Mackay began to perform and record regularly with a revolving line-up of musicians associated with Radon. The first full-scale tour of Steve Mackay and the Radon Ensemble was mounted in July 2003; with a percussion-heavy lineup that featured bassist Marlon Kasberg (Liquorball), drummer Sam Lohman (Nimrod 36), multi-instrumentalist Travis McAlister (Nequaquam Vacuum), scrap percussionist and vocalist Noah Mickens (also Nequaquam Vacuum), and drummer and band leader Scott Nydegger (Sikhara). Other musicians who have performed and recorded with the Radon Ensemble since then included the multi-instrumentalist Tyler Armstrong, projectionist Ed Cooper, bassist Giovanni Donadini, Nyko Esterle, multi-instrumentalists Kamil Kruta of Koonda Holaa and Dan Kauffman, bassist Jason LaFarge, saxophonist Vinnie Paternostro, Fabrizio Modonese-Polumbo, saxophonist Shane Pringle, Frank Pullen, Suzanne Thorpe (Mercury Rev), John Wiese (Bastard Noise), and drummer Ed Wilcox.