Cruise Control, by David Williamson, Ensemble Theatre, Kirribilli, April 30 His Mother’s Voice, by Justin Fleming, bAKEHOUSE Theatre Company, ATYP Selects, May 2 DAVID Williamson has been writing plays for more than 45 years and hasn’t lost his touch with the well-crafted one-liner that effortlessly extracts a happy burst of laughter from a full house….