Other than sub-mm drill bits in my Dremel its really only the parting off
discs I use . I do own a diamond-dust edge and faced disc but have never
used it, leaving it for some job that requires .3mm cut that so far I've
never come across a requirement for. Its far too easy to snag such discs
with hand held apparatus, but snap a .6mm grinding disc is an
inconsequential loss.

This is meant sincerely.

Your writing is improving. Keep at it.