View short video of Heysen Trail

At the Friends June LWE at Collinsville, a few of us with Arthur of Burra, met Josh of Perth – 31 days from Cape Jervis, at the east end of Tourilie Gorge.
He did complete the trail on July 8th, collected the certificate from Jack – and has posted his video of the walk –

I came across this video from a forum entry he made on the FoHT site.
At 19yo he may be the youngest to walk the Trail – esp solo??
Anyone know of a younger walker?