Serge,
I really would like to thank you for your “manual”
As for me, has to be considered as one of the “perfect setup guides for your RPI”
I just combined the mutability setup from this topic : http://discussions.flightaware.com/ads-b-flight-tracking-f21/what-is-easiest-way-to-install-dump1090-mutability-t35431.html and that made my day 
Greetings from EBBR/BRU
Leopold