Since this is a debate forum
most posts are negative on flushing. The liverflush support forum is more positive. There is also a liverflush facts (?) forum.
You are right about the ducts being small and my 1" stone
can't get out. Most people see cholesterol liver stones
or very small stones or gravel from the gallbladder.
Though I still have my stone I got other benefits like since childhood allergies disappeared and the same with my brain fog.
I know that this does not answer your questions, but I think there are no easy answers. There is good information at the top of the page under cleanse, see Liver Flush and click on the yellow banner that says "if you have
gallstones".