Dummy 13 Ultrakill V1 3 arm mod

I extended the original Dummy 13 clavicle ball joint and duplicated it to attach 2 of the arms side by side instead of on top of each other allowing a third joint to be added to the lower chest piece of mothmansculthead's original part. While the bottom arm joint on the lower chest is locked to the Dummy's left side, the modified clavicle can be used on the right shoulder or both to allow 4 arms on the Dummy's frame. Same settings as used for the frame should be used here. This is scaled at 100% of the original Dummy 13, so if you're printing at 150% or 200% as recommended by mothmansculthead remember to rescale both. This is my first remix of a model so any and all comments or suggestions are highly appreciated.