are you using an SDS100? Weldon Springs from south city is pretty good.Depending on your location. I forgot where you listen. It will not harm anything at all if you program a few extra nearby sites to expand your listening enjoyment. I live in SW St Louis city and can hear only three MOSWIN sites due to my low elevation. The city's simulcast, Weldon Spring and Imperial. But because of how trunked systems work I can hear troopers talk in almost every county south of the city and a bit less up north.
Amazing really because when I am in Laclede Co scanning on a good day I can monitor almost 14 sites in surrounding counties.
Good luck.