Is it true that you will still have to go in and reconstruct your 'favorites list' if there are updates to the master HPDB ??? In other words... if one of the radio systems in my favorites list gets an update / upgrade, etc... will I have to go back in and completely reconstruct that favorites list? And even more importantly; how will I even know if there has been a change to my local favorites, other than I notice I stop hearing radio activity?
That is correct. Sentinel would have no way to know whether what is in a FL is different from the original system in the main dB because:
a) You chose to not include some channels or sites.
b) You changed the alpha on a channel to something other than the main database alpha.
c) You added some channels or sites not included in the main dB.
And probably others that I've not thought of. Having Sentinel write over user's FL's every time would be a disaster.