Stripped Campy Chorus Cup...

I've been told that these can be hacksawed out.
How is that?
Cutting through the axle as well?

You mean the tiny little teeth in the thin aluminum BB shell? (I had it
happen on an Athena. The irony of such a dumb design named for the
goddess of wisdom nearly choked me!)

Not a hack saw but a Dremel tool and a lot of emory cutting disks.
Carefully cut a series of wedges until you can start breaking out
pieces. Eventually, you get enough metal out so that the assembly can
be driven out by pounding with a hammer from the other side. It takes
about an hour. Once the assembly is out, you might be able to get the
remainder of the cups out by turning with a mallet and cold chisel. (In
my case, once the assembly was out, I could turn the remnants by hand.)

You'll need to get the BB threads re-faced when you're done.

steveb wrote:
I've been told that these can be hacksawed out.
How is that?
Cutting through the axle as well?