John Lee Sanders & Rad Gumbo, jointly tour 2013, 
CD  "Rad Gumbo meets John Lee Sanders" 
awarded 2014 with the Preis der Deutschen Schallplattenkritik

Zakiya Hooker, daughter of the blues legend John Lee Hooker,  
jointly concerts 2014 and 2015 with Rad Gumbo

Chris James und Zakiya Hooker
jointly with Rad Gumbo 2014 & 2015 on the road

Frank Folgmann from Linz (AU), frequently companion at Rad Gumbo concerts

Kreso Oremus our award-winning "featuring"  harpplayer from Croatia