Billy, I have never used the bushings so I wonts say for sure, but with the bushing it seems you could peen a little harder because the liner is going to hit the bushing not the blade if the bushing is .001 bigger than the blade. This would give you a .002 space for blade to travel.
If you are having trouble hiding the pin this is really not the solution, the best thing I did was to get a tapered reamer to use on the pivot hole. Tracy sells them. Since ive been using the reamer I have been able to hide the pin every time. The problem I was having was I could hide the pin, then after opening the knife a few times it would show back up. The reason is because I was swelling the pin in the blade. This is where the reamer helped me, by creating some extra space in the pivot hole it allows the pin to swell in the hole, not the blade. Does that make sense?
Like I said before Im not sold on the bushings, but I say that without having tried it. I have only handled a knife with one.
Sean