So, when I got my 13' mustang, I was a bit disappointed that the new "high tech" center LCD digital display does not display MPH, I honestly think its really dumb. I would like to have a digital speedometer, so are there any simple add on ones that I can buy and just mount in between the existing ones? or is there a way to rig the internal computer to display the speed in the digital display. If i get an external one, which type? does anyone have one they recommend? All I want it to display is speed in MPH, nothing else that will clutter it up.