Bobby, it was good to meet you at Gamston yesterday, and to demonstrate my PAW to you. I hope I did enough to encourage you to return to the fold
As I explained, I was hoping to check out the Mode S detection as part of my flight yesterday, and can confirm that the rings showing around my aircraft did change colour from green/yellow/red when Mode S was detected. The indication of vertical separation is very difficult to see on my SkyDemon (I use it on my HTC Phone), so the audio warnings would be useful for me.
I think it would be almost essential to have the audio option in use on PAW, I haven't managed this yet in the air, but have validated that it works by using a cheapo radio headset connected to PAW when ground testing. There is another thread on here somewhere that explains how to combine the audio from PAW with a normal headset.
One interesting thing from yesterdays flight was that we detected a target approaching on a reciprocal heading, approx. 200ft above us, and we were at 3000ft. I guess it was an ADS-B target, unless he also had a PAW. Although we were in receipt of a Basic Service, we received no warning about it (Understandable as it was much higher). It flew almost directly overhead, and turned out to be a helicopter. I thought those thing only flew just above ground level