RAAF Simulators
Unless things have changed dramatically the RAAF Simulators are used weekdays only, with maintenance carried out "after hours". If there is a shortage of instructors, which traditionally has been a secondary duty for squadron personnel, there would be little scope for the simulators to operate other than weekdays during normal hours. It would seem to me that, as others have pointed out, the knowledge and skills of former crew could be utilised to reduce the time to get new crews "on line". Sure would beat the hell out of spending one's day in the local "Men's Shed".