Bob, I'd be interested to know what the doctor says after sending the stones off.
I did a Liver Flush last year, but I did it differently. A local naturalist suggested drinking 1 gallon of apple juice (organic) each day - no water, no fod, only the juice for 3 days. Then on the last night you drink 2 oz of olive oil (cold pressed, virgin).
The next morning I did pass stones and a lot of bile.
The apple juice alone pretty much cleansed my colon. I was "going" apple juice the last two days!
I know that what I passed couldn't be the epson salt or anything else built up. So, that makes me curious to know what your doctor's sending off the stones will reveal.