8 series K vs CMY drums. What's the diff?

[tsbservice]

You can mod DR-313K to fit DR-313C.

True, but to repeat for you once again KM inc. are aware of that fact and restyled K drum(NOT CMY).

This is the issue these is no ‘old’ & ‘new’ style DR-313K/C

If Konica Minolta did modify the image units we would then have to modify the MFD.

I'm done with you on this topic. Trying to explain no more