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Yeah, I'm being a bit cynical as to why he's so vexed and how he goes about things, but the frustration is justified for end-users. Imagine spending that much on a premium frame with misaligned, oval, shell faces and having to resort to a more premium or niche product. I've not had issues with my DUB PF frame/BB but would be pretty annoyed if I did.
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But in most cases the frame is good enough and people it's just fretting because you google creaks and go down Hambinis rabbit hole.
Doesn't help that every professional mechanic have a way instead of having training on a standardized way to do the job. Quite frustrating and doesn't help customer confidence.
Not here to defend him as a person(ality), just explaining the product: He's pissed at the poor QC in general, and his product solves the problem by being a one-piece BB (or the thread-together version) with the bearings much better aligned within that BB. There are products with the same idea, in a similar price range by other brands like bbinfinite.
My frame's PF30 BB was creaking crazy with the basic shimano BB, but a Wheelsmfg thread-together BB solved the issue entirely.
If you follow someone less abrasive like Rhino's workshop you can see other people being fed-up with having to face surfaces and chase threads on brand new premium £3-4k frames.