Guest musicians that contributed to Richard's work in the studio and/or on stage:

 

 Blaine L. Reininger (Tuxedomoon)

 Winston Tong (Tuxedomoon)

 Jarboe (Swans)

 Edward Ka-Spel (The Legendary Pink Dots)

 Peter "Sleazy" Christopherson (Throbbing Gristle, Coil)

 David J (Bauhaus, Love & Rockets)

 Richard Sinclair (Caravan, Hatfield & the North)

 Jeroen van Vliet

 Eric van der Westen

 Jurriaan Dekker

 Bart Maris

 Jan van der Lest

 Max 404 (TJ Kong, Clashing Egos)

 Graham Lewis (Wire, He Said)

 John Walker (The Walker Brothers)

 Clara Engel

 Gitane Demone (Christian Death)

 Frans Friederich (Dull Schicksal)

 Ryan Moore (Twilight Circus)

 Sandor Caron (Knalpot)

 Aardvarck (Rednose Distrikt)

 Jeroen Kimman (Rosa Ensemble)