I have a BB92 on my FM-936(same as BB86 but 6mm wider) while I had ordered it as BSA.
Being heavily Hambinized at the time, I was very disappointed(big spindle in small hole = very bad  )
But installed a DUB spindle anyway as I had it already.

After a year plus with the SRAM BB86/92 DUB and a heavy usage, races and mud, it is still surprisingly smooth.

On other bikes I tried GXP, BBinfinite(similar to Hambini), BB30, PF30, Wheels mfg and some Aliexpress PF by screw.
On all of these I was changing the bearings once or twice a year.

Moral of the story... for a DUB I would go every time with the SRAM, it is cheap and reliable.
And maybe look for something else only if unlucky, but probably the frame is then the problem (not concentric, or not circular holes) and any alternative won't probably work either.

I think it exaggerates the issue for sure, but i don't think these surfaces were ever treated during production after they come out of the mold. They probably are roughly prepared for paint and then leave the factory as is.

In my experience you have to be very clear with what you need an answer to, and be very proactive in the communication. Once shipped I got my order quite quickly: it was delivered in 9 days from Hong Kong to London. I went with XDB shipping and had a tracking code, all in all a good shipping experience.



As for my situation with the fork, Chris has forwarded the pictures I already shared here, as well as a short video I had of the fork to the engineers. I hope it can get resolved that way. Best case scenario they would send me a new fork, I can return the one in my posesssion if they would like that.

Also, a carbon fork cannot be bent or crushed in shipping

A carbon fork either flex a little and goes back to original position

or breaks in half. I cannot be bent like alloy.