Just to be picky.....when you say all GA, some might think to exclude all the RAA and glider folk.
If you can afford to fly, you can afford a transponder, and to have it check every two years.\
And if ADSB ever gets going, the Microair system would have both in one small box.....so no excuses then! Its small light and not that expensive, and if it was "dontaed" who cares, fit it and maintain it. Cheapest safety ever invented. Apart from your eyes
J
