Thought some of you may be interested in this.
Decided to sacrifice my clock and install an Arduino-based microcontroller in its place, primarily to allow accurate measurement of the effect of aerodynamic modificaitons I have planned for the future via the monitoring of fuel consumption while at a constant speed.
Bit of background on Arduino:
http://en.wikipedia.org/wiki/ArduinoMy install:
I tried to get it looking like it belongs.
Aside from the various outputs related to fuel consumption It can display standard stuff such as speed/distance, rpm, voltage & 400m time/trap speed, and will be as accurate as the VSS signal resolution allows so far better than any GPS-based unit.
Pretty much finished calibrating it now.
Unrelated to the above here is a shot of my stealth oil temperature & boost gauges :p