One thing I've noticed here is that we seem to have some confusion over "gallstones". Most of what is passed during a flush has probably never seen the inside of the gallbladder. These stones are formed in the hepatic ducts of the liver where the majority that are flushed come from directly. Some may get into the gallbladder during the movement and storage of bile from the liver where they may grow as more material enters and cause big problems. "Stones" are made of differing substances some of which may be hard (eg: calcium) and some of which may be softer (eg: cholesterol). I think that the word stone has people thinking of rocks but in biology it signifies any substance that causes a blockage in the organs whether it be hard or soft. These soft stones do not show up in x-rays, etc since they are very close to the density of the surrounding tissues. When most people (including doctors) think of Gallstones they think of the calcium variety. It is important to get these soft stones out of the liver too since they impede the flow of bile and therefore cause many problems in the body. Just look through the forums to see the wonderful side effects that people have experienced with liver flushing. Hope that this clears some things up.
Jay