The last 2 months I have been preparing for my first demonstration project with an installation of an array of 16 detectors in Adelaide Elder Park, South Australia as part of the Winter Splash Adelaide.   It was a lot more work than I expected, but I'm pleased to report it has been successful. It will be installed on the 2/9/2017. More to report soon. Here is a video of the build process from prototype to completed units tested in my back yard.  The sound of the detectors will be recorded at the event soon.