Get a grip. I didn't say there were no STC add ons, I said the TCDS included said landing contrivances, and the TCDS items were included in the flight manual, as you would expect.
I say again, the Australian flight manual produced in Australia had little resemblance to its overseas counterpart and is not the generic manual quoted in the TCDS
Be interested to see a copy. You can supply? Assume Australia in its wisdom knew more than the manufacturer.