[QUOTE="tim"] I had rather thought that Conor (as a professional driver) was assuming the line that my father used to quote "A good driver knows how fast he is going without looking at the spedo". I've no idea if he could actually do this, but if he could he didn't pass the gene onto me (not so that I can tell the difference between 29 and 34 anyway).[/QUOTE] In which case, I agree with Conor, I must be a good driver, I guessed correctly my speed, today, every so often I guessed, then looked at the speedo and was correct to within 5mph. I was varying my speed to test it out, and kept between 100 and 150 mph. it *is* nice to know a professional driver has sorted it, I always thought he was a clueless tit.