Well one problem is probably doing the taper, scale and other adjustments before you work with the breast size morph. Try doing the breast size "8" immediately after you conform the clothing item before you deform the clothes in any way. Then do your taper, scaling and other adjustments. Also, if the clothing item you are using does not have a breast size "8" morph on it by itself, it definitely will not conform afte using that morph on V3. In that case you will have to use magnets, use the Tailor, or postwork.