I'd have to agree with ADP here, although I think it's useful to find your own formulas for doing things. I have a bit of experience making breast morphs sets for V4, my Missus figure, La Femme (Eldritch Breast Morphs, which is in the process of getting an overhaul and update to be included with a larger scope project), and Sera.

Here's the morph set for Sera, included in my Sera's Secret project. I take an overkill approach to morphs, with breast morphs ranging from non existant, realistic ranges, to hyper ridiculous hentai style, but this set animates REALLY well if you take the time to do it.... Don't have the time or inclination to post any images, that can wait, but here's the dial arrangement. Might give you some ideas...

I was planning to also make a set for Antonia to go along with the other things, but that's taking a back seat to a more near completion La Femme project for now. It's interesting to watch your progress on this though.