What I am saying is the core groups could be retained and additional groups added just as body handles can be added.... if there was an issue with the non-standard groups folllowing poses they could be moved by ERC or in some other way slaved to the standard parts.

Some hair has many body handle parts beyond the standard head/neck/chest/collars but still there are other hairs loaded with tons of morphs that are less controllable and more memory intensive then body handles... why?

Likewise... since you can add body parts while retaining posability and morphing (there are versions of Posette and Victoria 4 with extra breast parts) has any one attempted to use that method for moving parts of clothing? There is innumerable clothing with non-standard body parts that serve as body handles for posing skirts etc (kobomax skirts and jackets come to mind) but I have never seen visible rendering body parts as say the butt flap on a pair of Long Johns...

All the opening morphs I have personally had occasion to use suffer from serious rotation caused distortion, morphs just don't handle spatial rotational well with mesh stretch and shear... on the other hand if there was a way to morph, morph brush, or magnet without stretching mesh it could let you hand manipulate mesh the way it is manipulated in Cloth Room... permitting translation and rotation while restricting "stretch" so it can be manipulated spatially without "lateral" deformation along the surface... it would be cool. I'm just curious if anyone has tried added "visible" clothing parts"...

I have always favored body handles over morphs in general for dealing with soft tissue like breasts, buttocks, thigh and shoulders. Body handles even work well for manipulating facial features as opposed to morphs in some cases.