Being new at this and very skeptical, here's what I think.
One thing that I feel adds alot of credence to the Bentonite and psyllium is everyone says how good they feel after they do it. It might not be mucoid plaque, but if it makes you feel better then, that's good. Clay has always been known to soak up impurities and psyllium provides the fiber to move it along. That's just my take on the whole thing. I have never done it.
I wonder if the same principle applies to the liver/gallbladder stones?