It's reported that Ross's kit-built machine was a Cicare CH-7Bt, fitted with a turbocharged Rotax 914.
The police report says wreckage was spread over 200 metres, thus indicating a high-speed impact.
No indication yet of whether an in-flight break-up was responsible - but with a 30,000 hour mustering veteran at the controls, something catastrophic certainly appears to have happened.
Airworks had a story on their website about the build, but the site page has now been taken down.
Pilot dies as kit-built helicopter crashes