@Travis , maybe "tighten up" was the wrong choice of words. Sorry, man.
When I rescued a A code blackie 3 years ago, the handle moved around some, and the top and bottom would move independently,
but based on the description above, not nearly as bad. When I applied the spar, the two pieces stuck together, and they no longer move.
@greenweb , as far as I know, there is no way to tighten the actual rivets. Maybe a time for a 2-rivet Zavandle.