Were they trying to pull it out by brute force?
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They were using a seat post pulling tool similar to this:
The tool held up great, the frame as you can see did not. Surprisingly the seat post did not budge at all. I would have guessed that the aluminum post would have let go before the seat tube.
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Just remembered I have this one from December 2023. First time ever brazing anything onto a bike frame and I forgot about gravity 
sure did waste some silver on that trying to get it to flow properly along the edge.
I mean it works though with me being a lightweight guy and only using a 160mm rotor and a weak caliper I had laying around. I’ll do better next time.
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Bah! Brazed the seat stay bridge section in teh wrong way. It has a left/right orientation which is easy to miss if you aren’t concentrating. Just threw it all together loosely to check a few things and this was highlighted sraight away. Grrrr…
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If you’re 3D printing stuff maybe it is an idea to imprint with an arrow or an “up” marking ?
I’ve lost count of how many times I’ve done stuff like this. Hopefully you can save the yoke. Keep going and don’t let this kind of shit get you down.
I’m not down. Had a laugh when I realised. Already ran through a few ideas to stop doing that again.
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