• Next time, put 2 big washers on the sides of the BB shell and the same on the head tube. Fix them with a threaded rods and ordinairy nuts.
    Cut the washers free with a hobby knife after painting to prevent that larger pieces of powdercoat will chip off.

    By the way, Decathlon is not that bad.
    I can imagine that they have HP and BB tools, even for milling, facing and chasing threads.

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