Funny enough this was actually the plan from the beginning but due to an oversight on my part I didn't use the right models to render the base images for the next size up so they just kept reverting to the base model size on new runs. There are some that slipped by so I think in some of the size two(?) base sizes the MCs bust and hips get bigger in some of the actions but are smaller in others.
I would like to eventually go back and redo these images to show growth but that's very low on my priority list.