<<Is there any way currently to edit the "master copy" of Details>Object properties>Annotation properties>Text <> to Text <> mu?
So the text of Dimensions would ALL have Text <> mu? Rather than editing each dimension by hand?

I have answered to this question some posts above! ;)
https://moi3d.com/forum/index.php?webtag=MOI&msg=10194.3
All is done in one pass!