Good for him. Just doing flushes will make him feel better.
My stone is 2.5 cm, I probably still have it, but with all the cleansing I never feel it anymore.
I also changed to the Ayurvedic body type eating.
Read the main forums about cleansing, bowel, parasite,
kidney, Dr Schulze, Dr Clark, Andreas Moritz
I hope I did not forget anybody.
You can even live with a stone. Check the liver/gallbladder cleanse, at the end it will tell you that 90% of the people have gallstones.