The veteran will fulfil a dream he had four years ago when he takes centre stage at a shearing event he helped establish - he will don a blindfold and shear one last sheep.
Mr Sanson sheared his first sheep when he was 8 and will celebrate his 80th birthday on February 14 by tackling what will probably be his last sheep at the 49th annual Otago Shearing and New Zealand Woolhandling Championships in Balclutha.
It was a vivid dream four years ago that has fuelled his ambition to achieve this last act in a more than 70-year association with shearing.
"I usually don't remember my dreams but the one I had of shearing a sheep blindfolded just stuck out in my mind and I thought why the hell not?"
It is fitting he will perform this unusual accomplishment at the event that has his fingerprints all over it.
Mr Sanson was one of a small band of shearing enthusiasts who started the Otago championships in 1960 and he has been intimately involved with the annual event ever since, earning life membership four years ago.
He still sits on the organising committee and will be at this year's event on February 13 and 14.
But for a brief moment on the Saturday night, Mr Sanson will take to the stage. He will don a blindfold, be handed a handpiece, be harnessed into a support brace and left to shear one sheep.
But, at his age, some preparation is vital. So yesterday, he and some supporters gathered at Geoff Finch's shearing shed near Milton to see if Mr Sanson still has what it takes.
The answer was an emphatic "yes".
Mr Sanson gripped the sturdy handpiece, strapped himself into the harness and hovered over the first sheep he has shorn in more than four years.
His eyes were wide open.
He took about three minutes to remove its wool and, after a slight fall towards the end, picked himself up, dusted himself off and clipped the last tufts off the animal.
Later, he tackled another sheep, this time while blindfolded but behind closed doors.
The real show will be performed for all to see about 6.30pm just before the finals night at the Balclutha War Memorial Hall. And the dress rehearsal appeared to take a bit out of Mr Sanson.
"I'm absolutely buggered. It used to be as easy as taking off your coat, this shearing a sheep," he said.
