I came up with it a few years ago when I was building my first big Humm Vee. If I hadn't figured it out back then, I'd still be sitting here trying to assemble those wheels.
Now on my second big Humm Vee, I wouldn't even think of using wheels other than those. I was at HobbyTown USA yesterday...
I know a lot of us have given up on gluing tires since it's almost impossible to remove them without ruining the rim.
Bead locks solve the problem of swapping treads for different terrain or conditions but are usually stubborn and time consuming. You start one screw and the tire bead comes out...