Quote Originally Posted by drifter106 View Post
agree...the sledge will act as a bucking bar...I have used a tool that is run by air (specially for rivets) to drive the heads in and it does tighten them up. Using the hammer does the same thing, just a little slower.
With the aircraft industry in the tank around here you can probably find a gun pretty cheap. Another to look into is drilling them out and replacing them with cherry bulb locks.