i run my own buisness where i work on electronics,take some flux put on the bad spot,then take ur solderind iron and retin that spot untill it looks filled in good,then if there is any solder excess take a small,tiny pair of dikes and trim it.should be fine,but be sure and cut out a small round piece of felt and put on ur cone where it was slapping,but be sure and felt both sides equalilly