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You need a good ball peen hammer. A small one. Most use comes from the rounded end. This surface needs to be buffed smooth. The smoother, the better. Shiny shiny shiny... You also need a back-up to the hammer. I have two sections of rail road track that I use for an anvil. You could use just about anything metal, as long as it doesn't move around or bounce when you are using it.
I have used a dremel burr to create different concentric size "divots" in my rails to use for the forming of the bottom pin and for stability. Pick a divot that is closest to the depth and shape of the pin you are working on.
Rest the pin in the correct divot while holding the handle in the palm of your off hand, thumb and forefinger stabilizing the pivot end of the razor. With the driving hand, tap the pin with the rounded end of the hammer. Tap tap tap tap. Not hard or you will crack the scales.
Here's a good rule of thumb when I say tap tap tap. Put your finger on a flat surface. Use the hammer to hit the fingernail where it does not cause pain... or bleeding This is the intensity that shoud be applied when peening. It make take 100 or more taps to get the job done, but you will not wreck anything.
Run about 10 or so taps, check for the desired tightness, and flip the razor so you can peen the pin that was on the bottom. Repeat the process until you have a tight joint. Patience is the key.
If you are coordinated enough, you can also use a modified 3/32 nail set that has a cavity with the same configuration of the pin crown. Place the nail set on the pin as you hit it with a hammer. Your off hand needs to hold the razor in place on the anvil and hold the nail set at the same time while you hit it with the hammer using the other hand. Or you could get some trusting soul to hold the razor while you hold the nail set and the hammer. You shoud try doing it the other way until you get the feel for peening. It is easy to hit too hard when using the nail set.
To dress the pins, use a 3/32 or less nail punch that has been modified to fit in a drill. At a medium turning speed, take the pin of the razor to the drill and use slight pressure as it is spinning. This will smooth out the surface enough to use other dremel attachments to make the pin look nice. Do not take the drill to the razor for this process. Too many things happen when you do it this way.
Have I made it as clear as mud?