Hair Physics Issue

[Toaster Oven]

So I've seen this around, and had it happen with a few other hairstyles in the past. I usually just don't use them rather than trying to fix them. Now that I'm working on something I actually have to confront the issue.

 

I'm trying to Convert YunDao's Fantastic hairstyles from wigs to racemenu hairs. I've been successful in getting them into the racemenu, and on to my character. The hair physics are working as expected however the HDT physics seems to break with the rest of the body. Collisions with hands are gone, and breasts and butts jiggle like gelatin nonstop regardless of what is going on.  I'm pretty amateur here and have run out of steam down the guess and check (and copy/paste) path. I've tried using JFF to edit the XMLs with no avail. I think it has something to do with the hairstyle picking a different body/skeleton, but I can't see where to go to fix it.

 

This is non SSE, running HDT PE. XPMS... Not sure what else is relevant.

 

Progress on the hairstyles thus far:

Spoiler