How to import current 3BBB mesh in game to a .xml or bodyslide preset.

[wingman101]

Hi all, how would I go about extracting my current in game 3BBB mesh into a .xml/preset for body slide studio? I had made a body preset that showed in bodyslide for the longest time without a .xml file but all of a sudden it has disappeared from the menu with no obvious way for me to recover it. I heard bodyslide packages the mesh into the mesh0.bsa file directly but when I've tried extracting that with BAE and importing the .nif into Outfit studio, I only get back the default vanilla body.

Any help with this would be highly appreciated