This is a job for a #DremelTool, with a grinding attachment. Eventually I switched to a bigger one.
Notice the safety equipment. Goggles and earplugs. The point of a horn is to amplify sound, and if you're grinding metal out of the small end, a really loud noise is going to come out of the other end! I also stuffed some paper towels in there to dampen that.
Also: This white metal is called "pot metal"--as in, the factory dumped all their scraps into a pot and melted it. That probably includes *lead* so be careful. I wore a mask too (the kind to prevent the spread of covid). And do this as far as you can from anywhere that might involve stuff you eat. And wash your hands afterwards.
After a bit of grinding, I tried various random handy things around the workshop to try to break up the metal, but it was mostly just grinding.
#CylinderPlayer #RecordPlayer