Please don't get me started on Wamira. (It was AAC, Australian Aircaft Consortium, not just CAC) I mentioned it in a presentation to defence and industry recently as an example of the lessons still not learnt.
One view back in the '80's was that working with Defence was like playing Chinese baseball for which the rules were the same as American baseball except that at any time the ball is in the air, any player may move any base to any position.
Interesting that an early concept was based on a turbine CT-4. (It turned out to be a nice aeroplane.) Once they piled on any MIL spec they could find, Wamira needed something like a PT-6 and it became bigger and heavier.
I recall discussing horsepower over a red wine with a high ranking RAAF officer back then - when I said that we needed to go up from 550 to 750 he said it "would be too overpowered". We needed it to meet their specs.