During, before & after.
The only change I made to both pieces was to topstitch the neckline seam allowance down, it's definitely helped it sit better, but I think a higher neckline and a smaller neckband might work better. I'm really glad I raised the neckline, it would be falling off my shoulders otherwise so watch out for this if you decide to make it.
The dress unbelted, I like it more than I thought I would. Still need that long necklace though.
Belted. I'm more comfortable wearing it like this, it has a very grecian draped dress look to it.