The README states that O.0 has the tightest tolerances which are loosely based on ISO M30x3.5 6g/6H
And this seems to have been vaguely correct in V1, but it appears to have been changed in the later versions such that O.0 means that there is absolutely no tolerance whatsoever. Even O.1 is still tighter than Fusion's own metric thread profile's 6g/6h class.
The README states that
O.0 has the tightest tolerances which are loosely based on ISO M30x3.5 6g/6HAnd this seems to have been vaguely correct in V1, but it appears to have been changed in the later versions such that O.0 means that there is absolutely no tolerance whatsoever. Even O.1 is still tighter than Fusion's own metric thread profile's 6g/6h class.