nickmann said:FWIW (not much) my background includes-
Several years' motor-racing, on tarmac and off-road.
Several "advanced" motoring courses.
Several years' as an instructor, including as an instructor instructor.
Worth a lot more than me mate

Reminds me of the old saying;
Those that can, do. Those that can't, teach. And those that can't do either, examine.
Where were you based mate? We may have crossed paths in another life?
Warm regards
Jim