I looked at those in Aircraftspruce, and never thought of ebay. Retarded...

Ditto the range of resonant frequencies. If you want to get fancy, hook the det sensor output to a microvolt meter, and touch it with a series of tuning forks (know any piano tuners?) or zap it with a tone generator (any superaudiophiles?) and note the peak voltage range. That's the natural freq of the piezo quartz crystal in the sensor, and where you should set the detect freq range in the software.

Careful, Frank. You are getting into the thorny thicket now. Way better to be rich at power type fuelmap ranges (high MAP), because you can avoid the det limit for a while by fuel dumping. You won't make the pure optimum power, but you'll make more power than you would if you turned down the boost.