this is a byproduct of how MarshmellowPB does the bones and limits.
it only works for assets of a single size, no sliders or changes without a buttload of custom animations/parameters to fix it.
@taliatan So...kinda of a yes and no. The marshmellow pb DOES work but the scaling still does not. Yes i have turned off the former physbones and even tried making a preset but i just cannot seem to get the hang of it. Would you perhaps have time to walk me through this? Im a rather quick learner.