Cut the shim to the size of the square on the tumbler but leave it long enough to hold , say an inch long so when tapping the hammer back into place you can stop the shim from coming out of position . When the hammer is fully down the excess can be simply twisted off or cut off leaving it flush .
As said this is a quick fix and will usually stand up well to use but it is not necessarily the only way or some would argue the "correct way". I have also employed this method for taking the play out of worn top levers when normal welding or spray welding is not the best option .
Last edited by gunman; 12/06/16 12:42 PM.
