More sanding! Within 1mm of the original width, which appears to be 7mm wide and 7.75mm deep.
A bit more careful sanding to 0.5mm, and hopefully should be within the tolerance of whichever seatpost clamp will work.
@Acliff started
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More sanding!
Within 1mm of the original width, which appears to be 7mm wide and 7.75mm deep.
A bit more careful sanding to 0.5mm, and hopefully should be within the tolerance of whichever seatpost clamp will work.