I have a simple fusee movement clock that stalls out on the stop arm. The chain will wrap 3 times around the cylinder then get stalled out by the stop arm. When the stop arm reaches its upper limit it begins to rub against the coiled up chain, as a result the clock stalls out. I am a novice at clock repair, any help is appreciated. Would it help to file the nose of the stop arm down to allow it to clear the coiled up chain. There is a bit of play around the pivot point of the stop arm. Thanks again, Cheers.