Red line on a chronometric rev counter records the last highest reading - think it was Roger Clark who famously said if you go off backwards floor the throttle before switching off and put it in top gear - when the mechanics find it they will think 8500 in fifth all is forgiven!!!! - In regard to Blydenstein Lotus Vauxhall's there are many stories of 9000 or even 9500 without damage - amazing strength.
Malcolm