the P01s parts are interchangable or SPECD' I also read
That would be a nice feature, but parts for other CZs don't really seem to require much in the way of fitting.
This change for P-01s and SP-01s is probably a tighter adherence to specs (QC?), as noted, but I don't think it's been a big problem in the past.
If it's a change to quality control, it has to be a positive...