John Mayer posted footage from the studio where he and Steve Jordan got back into the groove. “This is the guitar I wrote the ‘Stitched Up’ groove on,” Mayer says. “I’m playing a Novax 8 string guitar (bass and guitar on the same instrument) through a Fulltone Tremolo, Way Huge Aquapuss and into a Dumble Overdrive Reverb. Alessandro 2×12 Celestion gold speaker cab.” Watch it below.