If you're interested Tim, I've got an Ultragauge thingy that reads out RPMs, MPH, coolant temp, etc. It's a little GPS shaped thing that plugs into the OBDII port. I'm sure it would make the needle calibration a lot easier.
Mine: 2002 Focus SVT: 142k, Sonic Blue, #1654, All Options
Mods: Tom's Tune, Borla, HFC, STS, Painted Machs, Euro Grill, FRPP Springs
Hers: 2010 Focus SES: 67k, Ebony, Auto, Moon and Tune