I’m using a KX3, and by “wide” I mean about 500Hz. The trouble I was having was that chasers (multiple) were calling spot-on my frequency (so narrowing the filter to 50Hz didn’t help), and they were near enough equally strong, and my “XX0?” style attempts to thin the chasers down didn’t always work. On at least two occasions it took nearly 10 minutes to thin the pile-up down to one caller, and I’d be un-surprised to find some callers had worked each other thinking they were working me…