A severe bout of tinnitus curtailed his DJing activity and brought a halt to his record productions for a couple of years, but by 2008 Carter had returned, first with another one-off collaboration with Tim Sheridan, and then "The Rabbit" with Stretch Silvester of Stretch & Vern, the first single in a planned series of collaborations with other DJs under the name Gentleman's Agreement. He has also teamed up with Liverpool-born, New York-based DJ Alex Blanco under the name Roosevelt High. In 2009, he became a member of the Rizla Invisible Players, an ever-changing collective of musicians and artists. Alongside Carter, the 2009 line-up included Jazzie B, Micachu, Gruff Rhys and David Shrigley and performed at a number of festivals across the UK that year, including RockNess, Lovebox, The Big Chill and Bestival.