Hey Slides
Yeah cutting tyres was , or should that be is, a bit of a black art , everyone had their own technique and method, saw Springer at Canberra, cutting new edges on his XR's rear with a single edged razor blade and Clarry Jones' pit crew at Bendigo with specially ground and sharpened blades in a hacksaw , they were busy all night.
Cut the K70 rear on TD's Astro, at Griffith in the '70s, after him complaining of it spinning up at the start, kept the front up all the way to Turn one afterwards, he couldn't believe the difference.
Foss