I don't see the problem getting rid of V4's boobs with a decent sculpting tool like ZBrush.

Even the morphbrush should work. Heck, I used to create all my sculpts with just magnets in ye olden days.

These four morphs are based on the 3rd gen mesh which is even denser than the 4th gen mesh.

Best way to create "tiny" boobs is to first make a clean slate by completely flattening the chest. Then you can "grow" them bigger like they do in real live.

That works better in my opinion than trying to fix Vicky's default boobshape.

;-)