Strange technique-idea regarding hanging + clamping

Probably dangerous... but anyways!

So I don't clamp. I read about it. Hear mixed things, per usual. Purely length focused atm. But then I recall manual stretches, and how HINK suggests to use two hands. One pulling behind the glans, and the other at the base "clamping" down creating an isolation in the stretch.

So... if I vac-hang straight down, should I be putting some force, like a clamp, around the base of my already very thick, uh, base? To create that isolated stretch?