@prymerion I've only been playing with mods a few months, and haven't created any myself. That said, it seems as if body sliders need to be added to the armors manually. I don't know how to do it yourself, but most CBBE armors either come with bodyslide files or have a second mod available with the files. Either look in the optional files for your chosen mod or search your mod and see if there are standalone bodyslide files. Install with your chosen mod manager and build in bodyslide.