[mr0077]

Wilf, now THAT'S what I'm talkin about...GPS would be the way to go!
BTW, my ancient escapades were calculated from tach readings 'cause...even in the 60's and 70's everyone knew the speedos weren't reliable. FWIW, the speedo reading was within 5 mph of the calculated speed on all three...hey, I was an engineering geek, whadaya expect?!?