Adam I've successfully fished a rotary setup on tubing, the top bead being oversized with a short piece of dry spaghetti under it to keep in place. The bottom bead pushed down onto a long tail rubber to prevent it from snapping the tubing when playing a fish.
Going back to something mentioned earlier in the thread (Can't remember who) my opinion is also that dropping the lead with rotary/chod setups on leadcore, will make the rig more dangerous.