[Lynn Eades]

Im not familiar with this set up. I was speaking generally. Normally, if there is a double nut, the first nut is not done up tight, because after the lock tab goes on, and the second nut is fitted and tightened, the preload will be too tight.The reason for this is that the nut moves from one side of the thread to the other, due to the thrust from the lock nut. This increases the preload on the bearings. To arrive at the correct preload, we have to back of the first nut, knowing that the lock nut, when tight, will make the preload right.
This is when it is easy to damage the lock tab.
Does this make sense?