Steve Hodges: marimba, clave, and other percussion on "Losing You", glockenspiel on "Leica", percussion on "Bullfighter", congas, shakers, and other percussion on "Carlos".
Ivor Vejar: vocals on "You Got Me Cry'n" and "Powerful Mexi Radio"
Curly Allsup: vocals on "You Got Me Cry'n"
Mark Cole: bongos on "Worst Days"
Matt Clatterbuck: Violin on "If You'd Like..." and "Bullfighter"
Paul Justice: Trumpet on "Bullfighter"
Kevin Laurence Barrans:
Theremin on "Powerful Mexi Radio"
Tim Stevens: guitar sounds and bird calls on "Space Cabana"
Other
Recorded and produced at Tackyland LBC by Matt Wignall.
All songs mixed by Matt Wignall, except "Space and Mexico", "Bullfighter", "You Got Me Cry'n", "Rocketship", and "Pluto" mixed by Anthony Arvisu.