A good analysis there Nick. I have often tried to imagine what impact modern tyres, suspension and brakes would have when combined with the changes to the course.
The variable factor of course is the rider, and I guess it's difficult to say how Geoff Duke, Mike Hailwood and Giacomo Agostini would stack up against the current crop of TT riders who now race replicas of their machines. My personal feeling is that they would be faster, simply because they represent the best of their era bar none. They compare to Marquez and Rossi today.

John