One Piece Belly Mod W&B Change?

[EricJ]

3 hours ago, ArtVandelay said:

So unless you’ve lost your W&B history makes it useless exercise.

I think it can make sense either after a long period, to reset accumulated errors over numerous recalculations for modification and for accumulated repairs, gunk, etc.

I've done it a few times for people after major alterations, too, to save having to recompute everything for a large number of significant changes (e.g., refurbs on experimental aircraft).   It can save a lot of work for cases like that.