I started by cutting out some leather discs. I made then all 2
3/4" in diameter using a hole saw at
the drill press. The hole saw created
the 1/4" hole in the center. I made enough discs so that I would
have a stack 2" tall after they were all glued together.
In order to glue the stack of leather discs, I needed a 1/4" all
thread bolt and some washers big enough to clamp the stack.
Use a lot of glue when putting the stack together. There will be
a lot of squeeze out, but that will wipe off. I don't think it
makes any difference which kind of glue you use.