How do you find frequencies? I'm not talking about the ones in the RR Data Base. Where did everyone get them from to fill the DB? Example your local PD, did you go the station and ask? lol Sit for months with your scanner, searching frequencies? Where do you get them? Any of them PD, FD, Rescue Squad, Walmart? Also how do you know what type of system they are using, and/or when they may change it.