Change from the Weak to Strong.
Last week Stephen took all the mast steps off and re-install them back one by one step with 70 new bolts. To re do this task a second time because one mast step had fall down. Which meant that 70 rivets had to be drilled out, the steps re-drilled, the mast re-drilled and tapped for the bolt threads and then everything matched up so that 5 new bolts for each of the 14 steps fit and good be tightened on.