Slot Rays- Infants

Hello, so I was converting a romper to infants, from toddler... which was originally for children- it's been through a bit.  Anyway, normally when I convert from children to toddler, if it's a clothing item like top, bottoms, or body, I just clone a new nude mesh or whatever for the desired age group, and then import my .blend into that, and I'm good.  Conversely, if it's a top, bottom, or body item, and I just change the age group I will have slot ray issues.  So I clone a new infant body piece, and add my mesh, no luck.  I've tried using the "fix slot rays" option in S4S, and it's not helping either.  I can upload an image, but it's just the usual slot ray stuff, arms going crazy.  In this case it's really noticeable on adults holding the infant, their arms go mad.  Any insights or ideas to fix this would be appreciated.  Thanks!