@aok47 - that's what made it such a great plane - ingenuity and innovative design.
Using the height adjuster from a Victa lawnmower as the Airtourer manual trim lever is hard to beat for an example of home-grown engineering.
The brake master cylinder is from an EH Holden and the front wheel leg is a Ford Prefect McPherson strut.
Later model Airtourers used a VHF/UHF antenna from an F111.
The design itself, certainly the wing, fuselage and tail were largely copied from other proven designs such as the Provost (eventually Strikemaster).
Ours is a much-loved member of the family. I haven't shown it much loving recently, but might visit the hangar tonight to give it a pat and a scratch under the chin.