The Bristol lost was VH-SJQ on 10th May 1975, Les Barnes was the Captain (ex ANSW) and the other crew member was indeed classified as a Radio Operator. One result from the enquiry was to have two endorsed pilots as crew members, introduced by Gordon Howe, the new Chief Pilot. SJQ was a Mk 21 with slightly smaller engines than the 31. Its sister, ex SJG, is the one at Point Cook while the surviving 31, VH-ADL ("Adolf" we called it) lives in retirement at Moorabbin, locked behind a fence where it can do no harm. Sorry to sound like a complete Anorak, just can't help it sometimes. Nice paintings by the way.