Anybody remember these? Almost like sliderules. Ya'll play nice. Aren't we an aged group of fuddy duddies! I know folks that couldn't find there way out of a wet paper sack with a compass. L and Ls, coordinates by GPS. I've followed a few fellow Riders, GPS equipped that could not either(above). Evolve? I don't know from what I view in the news these days! Ride well everybody. Randy