Just to get back on topic for a second, I found a site where you can program a TomTom GPS to give a large speedo readout.
I bought a refurb TomTom for about $100 from Tiger Direct it works great. I'm thinking of putting the Tripmaster software on it from the site below but the instructions are a little confusing for an old gearhead like me.
Maybe someone could translate?
2007 997 Twin Turbo, GT Silver over black, Flashed, Switzer exhaust, Bilstein lowered, It's freaking Monster !
2010 RX350. good at what it's good for.
2011 GT Kona Blue, Premium leather blue stripe, Automatic, HID's, Glass roof, Nav,