How about VH-ISA or ISD.
I was told ISD was demostrated on and off one of HM's Aircraft Carriers. But that may have been just the Salesman's talk!
It was that long ago, I doubt any of us can recall exactly...
I flew both the 260 & 300hp versions in PNG. While the 300hp had the grunt, I found the 260hp version much nicer to fly (well there's an oxymoron) and easier to operate.