This brings back memories, I went in to work normally at Redhill a few years back, when Angus McCloud collared me, and said " can you go and look at an S76", I said of course, where is it, he said "Tokyo", I said" your kidding its only two weeks to Christmas", he said " no kidding, the Berkley brothers want a new aircraft".
I travelled to Tokyo BA club class, care of the Berkley's and surveyed the best S76 I had ever seen.
It was purchased, and freighted to Redhill, where it was modified for the UK, and had its first UK C of A. I was involved in the certification, between Sikorsky, and Bristows design office, and as someone has said, it was unique, in that it had -046 transmission, and uprated Arriels, mated to an "A" airframe.
The single engine full power could be used, but the twin Torque had to be restricted, this meant the modification of unique Torque indictors.
I believe my old mate Dave Pridmore was in charge of it, after I retired, before his tragic early passing.
I may still have some photos of the machine in Tokyo if I can find them.