 Kirshner next allowed Nesmith to produce sessions, provided he did not play on any tracks he produced.Nesmith did, however, start using the other Monkees on his sessions, particularly Tork as a guitarist.Kirshner came back to the enthusiastic Boyce and Hart to be the regular producers, but he brought in one of his top East Coast associates, Jack Keller, to lend some production experience to the sessions.