It haint all that hard to do.
If its a pinned cap just simply use a smaller punch and knock out the pin.. Then replace the leather stack which you can by from Kbar.. Actually Kbar sells a complete rebuild kit..
If its a peened cap then you have to very carefully grind of the peened metal. And then use a nice sharp file and file down the cap untill all the peened metal is removed.. The cap then can be knocked off with a soft hammer..
So how do you put it back together? He He thats a trade held close to the chest of few who actually remove and replace the stacks..
I just simple put on the rings, then put the whole think in a vice inbetween two pieces of wood and compress the entire thing.. Use a wide jaw Vice grip to hold it together.. then put on the cap and back to the vice and back to the Vice grips.. Duct tape helps hold the leather rings in compression.
Once you have that part down the only way I have found to peen the cap back on is to use a drift punch. It wont look just like the factory but close enough...
Use spray paint to match the color if the knife was painted..
And the rings will have to be hafted to fit your palm
I have done many and still take orders..
Chief Instructor USA BANDO & American Kniveswww.usabando.com