Yes, Kerschbaumer's bike is a Hongfu 258 with some paint.
After some research, I pretty much built up a top-end version of his bike after seeing some pics of the Torpado Matador. Think it's 9.4kg.
And, yes, you can indeed mount the shock upside down like on his bike. It took me a while to realise that mind you!
Did half a season on it in Irish xc national races and got on pretty well. First time racing a full suss in years of racing.
Still needs some tweaks though, the saddle feels WAY far back when pedaling due to the strange seat tube angle. Thoughts on this??? Also, I changed the stem to a 80mm with a normal angle. The other yoke in the pic was tricky to control with the downward angle.
Excuse the crappy quality pics