Are you talking about using CI foams in the ripsaws?... Or the vaterra swampers?
I was reading a topic on here about venting tires, and I guess a lot of you guys like to vent your tires and run closed cell foams. I used to be that guy that always kept my truck away from water. My rule was no deeper than the sidewall, so I didn't have to take my beadlocks apart, as my wheels were vented. These days I have been running the older style axial plastic beadlocks with metal rings and using open cell foams but keeping everything sealed up. This has for the most part been working very well for me. Only the occaisional hole poked into a sidewall has messed things up for me. The ripsaws on the truck now are all sealed up with soft foams, but I put a rubber band around the tire to collapse it a little as it looked too rounded when I was putting it together. This has worked out well too, because typically at the start of my trail runs I need a softer tire, but by the time I hit the summit and it's more bare rock the pressure at altitude firms up the tire.