Could maybe even run a rope from the nipple clamps down to the chain that's hanging from his balls, with the weight on the end of the chain. That way the more he moves up higher, his nipples take more weight but it relieves some weight hanging from his balls. Of course I would need to make sure there's a strap around his waist or his balls are tethered to something near the ground so he can't pull completely off the giant dildo. Which would you prefer weight hanging from, your balls, or your clamped nipples? *evil grin!*