 Engine fitters and Airframe fitters became Aircraft Technicians while Instrument Fitters, Electrical Fitters and Radio Technicians became Avionics Technicians.The only mustering which could not fit neatly into either (due to the multi disciplinary nature of their work) the gunnies were given the choice of going to either mustering.Of the 400 or so in the whole of the RAAF only a handful elected to become Aircraft Technicians.