Hi! I'm Oleg Khalikov, owner of Hofobike workshop. I repair alu fraimes for 3 years and repaired over 140 frames for now. I give a warranty on second cracks for 1-2 Years. 7 frames were re-repaired for now. About 5% of warranty repairing again. Some frames live about 3 years without cracking again.

My photofile is here:
?????? ???????????? ???, ????????????? ??????, 89267021384 - hoff - Photo.Qip.ru / id: vas

But I can to talk about every new frame here. Vere are many of factory made frames drawbacks May be it will be interesting for builders/manufactories for see some obvious failures and the ways of making this joints, where cracks where found, stronger.