Recently went from a Dutchman system to a Sail Pac and Lazy Jack system. The installer attached the upper lazy jack lines to the middle of my top spreaders on pulleys for tightening and relaxing the lines during sailing. After 3 times out my port side spreader broke the casting at the pin hole. At my marina all boats have their top line attached to the mast up high... Was the spreader the wrong place to attach the pulleys/lines ?? Thoughts.