The brass cable in my fusee movement recently broke while winding - there was no damage. I replaced it with the same length of gut & used a prescribed method to set the preload. The clock had previously run about 6.5 days. Now it runs about 4 days w/half of the fusee cone still wrapped. The preload procedure is one recommend by a member & has worked fine in all my movments. The spring is wound VERY tight now & I would not want to push it any further.