John:
I seen a guy over at the ORV Park one weekend that was running those internal bead locks by Staun. He said they were super easy to install (just drill a hole in your wheel) and they lock both sides of the tire where a lot of people just put the steel ones on one side. He said they were cheaper than the steel ones due to locking both sides and he said there are several brands to choose from that are cheaper than Staun. He had one tire cut down, so I got to look at one, and it looked like a big piece of fire hose that lays flat in the center of the wheel until the tire is mounted, then you air it up and it pushes out against both sides of the tire. This guy said he was running about 2 psi in his tires and never lost one. Just something I thought you might want to consider.
Rick