HAha!!!
That is what I was wondering. I could mount a piece of UHMW rod in the center, and slip the Prothane over that. It would locate the Prothane, and act as a bump stop. We'll see though I want to test it out first, but I'll probably be in the same boat as you.
Uhhh... I ran helium inside my coil springs to act as a bump-slow-down before.... works great, but always makes me sound like a chick when I am done filling them...:anon::laugh2::laugh2: