Essentially what the Devs did for Ragdoll Universe was make your actual player character invisible. The “character” and ragdoll model you see is just that, a model. Make your actual player character invisible and keep the normal physics. Add a dummy model to your torso with the desired ragdoll effects (ball joints, wobbly stuff and such), script the model’s head to follow your cursor, and there you go
You’re really just using your normal player character to ground and move the ragdoll model that’s flopping around. Plus, it’ll be much easier doing this, compared to trying to get a wild and wobbly ragdoll to walk somewhat normal. Hope this helps!