Alright, just so I am understanding you better when you say a torso with four arms your mean two regular torso stacked onto each other? Because when I google searched that’s what appeared. If that’s the case I’ve got some ideas to alter the original to fit. Such as changing the six pack to an eight pack and adding in additional armor plates maybe more of the green area too. What I’m trying to avoid is stretching out the original design because that’ll look gross.