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Sadly not. There's a "ring" of plastic between the cartridge and the frame shell that I can't get to, and I think that's keeping it in. That's why I'm thinking of melting it out somehow...
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A mechanic at LMNH did that for me once after I rounded out all the teeth on the stupid shitty Shimano BB. You just need to cut a chunk out then use a vice to squeeze on the bit that extends past the BB shell.
fizzy.bleach
Sumo
@pifko
Did you manage to get the cartridge BB out after destroying the plastic cup?
If so, you could now thread a hacksaw blade through the BB shell, attach to the hacksaw and saw a few notches into the remaining metal cup (being careful not to damage the BB shell thread) so it'll hopefully fold in on itself with a bit of force. I think I read that @sumo had done this and provided pictures?...