I fixed my problems (body and outfit being out of sync) by using "Batch Build". However, I still need to know about my other issue. I'd like a bikini-like outfit to retain bounce. However, I wouldn't want a plate armor to have bounce, as that leads to stretchy metal (ew). I'd also prefer if breast size could stay the same, such that if I used the ECE breast scale sliders the breasts on static armors wouldn't appear larger or smaller than they should. So that leads to this question: is it possible to create an outfit that can use the ECE breast sliders without also using physics, while physics are enabled? Old post:
