Style Arc Livvy Dress FBA?

Hi all Threadys, I always have to do FBA on patterns. There's 4" difference between my high and full bust.   I'd like to make the Livvy dress which is essentially a bra top bodice. Any advice and your experiences of making any adjustments would be most appreciated. TIA.  

Hi Annie, ooh this looks beautiful! I haven't seen or done an FBA on a bodice like this before, so if anyone else has any better suggestions please chime in.

It looks like it has gathering under the bust as well as shirring across the back so there's lots of room to play around with. My initial thoughts (could be wrong) would be to do your regular FBA steps, creating a dart at the side. Or to transfer the dart into the gathering at the bottom, which adds more fabric at the bust.

I would do as Hayley suggested and do a regular FBA on the bodice to create a dart, then slash through the pattern from the dart point down into the centre of the gathered part and pivot the dart into the bottom to add more gathers x

Thank you ladies. I'll give it a go and keep you posted. 💕

Good luck, hope it works