Got my NN3MII about 2 months ago off eBay. Today was the first day I used it.
Don't ask why. Noticed a weird thing with the detente plates.

Either the two pin holes that keep the detente plate from spinning are different
sizes or the pins themselves are two different sizes. If I put the detente plate
on one way, it doesn't fit flush to the face of the arm -- rotate it 180 degrees
and I don't mean flip it over -- and it fits flush.

If the detente plate doesn't fit flush, there is play on the axis of the rotator.
And the whole system wobbles slightly -- not good.

When it is flush, no play -- every thing is good.

I'm not complaining. I'll keep what I have -- just thought you should know...