Well, the problem the OP had is the reason why colnago started doing like indentations in the BB shells in the C40 and C50s, so the BB stays there forever w/o moving. No idea about the other models tho.
If the OP goes by the DIY, I would advice him to play with the idea of putting maybe a pin or something in there to hold the shell forever to the carbon as a preventive measure.
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