Hi Larry,

First off, I wouldn't introduce lost motion as an answer to the problem.
Restrict the movement of the pneumatic by gluing a small circle of felt onto
the face. You'll have to size it carefully so it accomplishes the task. If
it's too thick it will cause fluttering. This may sound a little tacky but I
do recall seeing this methodology on more than one player action in the past.

Good Luck, John