The original concept of the Dove in about 1966 was to run 203 operations between city's such as Albury to Fishermens Bend, which was less congested and closer to the city ( as YMEN was the primary airport - Tulla was still being built). This proposal was before the evolution of exempt 203 operations, and was resisted strongly by the two majors. Fishermens Bend of course was due to disappear under the Westgate Bridge within a few years.
The Dove at Lovely Banks never flew again after a heavy landing, which the insurance company refused to pay out on, and I believe is in a museum some where.
Jack's ideas where ahead of the times in many cases, but finance was always his biggest problem. with investors pulling out when the promised returns didn't eventuate.
I can remember the Auster Aiglet trainers he had, which were the only Austers approved to spin. I also remember some of the Examiners at MB not being happy with doing licence tests in them in the winter.