I'm fairly certain the S58T didn't get onto the Oz register for some stupid CAA technical requirements. Helicopter Utilities had one in their Mascot hangar which I was going to fly on the strength of having 1035 hours on the Wessex Mk5! In about 1969 or 1970 it went to PNG, not too sure what rego. Eventually Airfast had several in Indonesia which were steadily crashed! Gladstone had a S58 which could outperform the S58T until that too crashed on the runway! The Super Frelon did a good job in Kiunga I think it was.... they built a massive pad for it.