Those rimshots could be moved in with DAs if the received interference were increased somewhat, even going to 63-66 dBu F(50,50) protected contour. The stations they are short spaced from would be fully protected. First Local Service is an outmoded joke. The rimshot First Local Services close to larger cities have always attempted to serve the larger cities, with little attention to the official COL. And games are often being used to move these stations in by powerful group owners anyway, like a chess game, where they own all the pieces. Back until 1962, stations in the same metropolitan area were allowed 20-30 miles apart in many cases on second and third adjacent channels. I wouldn't complain, but people here are calling for wholesale abandonment of AM stations without replacements, like in Canada and David can chime in on Mexico as to what the situation is there.