Great story, I got the wrong Ron when I said Ron McCall; it was Ron Pracey and I recall seeing the winning photo on the wall at Jack's around 1975. And Jack and his trick-pony - what a hoot!
The old Narracoorte track in SA was only 2 1/2 furlongs, like Wayville, but Greenwald must handled both tracks OK. One night the horses were on the track and, the story goes, when the chief steward spotted Greenwald was missing a hopple carrier strap. It was substituted by a piece of hay band! The steward ordered it removed and sent the clerk of course to get a proper hopple carrier.
The clerk of course returned, sans carrier strap! The race was delayed for several more minutes while a desperate search went on for the piece of hay band tossed over the fence a few minutes earlier!