Quote:
Originally Posted by redmodelt
Re the castle nuts; they are not on there to allow it to be loose but to be used with a cotter pin so the nuts don't come loose and fall off. The nuts need to be tight so the arm does not work back and forth enlarging the holes.
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The person that posted the above information about them being loose is one of the most knowledgeable persons in the country, when it comes to model A's.