I spent a good deal of time in chippies with Pat Gallagher during the late 1950"s as I worked weekends on the old Morris fuel truck while learning to fly. I often went with Pat on test flights and he taught spin recovery as being specific to aircraft type. Interestingly, Tom Long, George Martin and Bill Lord all had slight variations to each other. During the sixties I flew Lockheed Hudson's with Adastra and the chief pilot, Lionel Van Praag demonstrated two spin recovery techniques associated with the load distribution in the aircraft.
The RACNSW and the members remain the foundation of all that came after.
Cossie