i passed stones on my last flush (monday) they were 1 cm - i did the flush during the day and had no pain at all. i felt some pressure and a bit of popping like feeling after the Epsom Salts but no pain. i think the Epsom Salts relax the ducts so much that the stones sometimes start to come out before you even have the oo drink.
i've done 6 flushes. 2 that contained the Epsom Salts were sucessful, the other's did not produce stones.
so make sure you take the salts if you are afraid of pain. keep a tub of very warm water ready and soak in it between your salt doses. water relaxes the body and mind. hot cloths also help relax!
if you hate the Epsom Salt taste put em in gel caps - i tbsp. is approx. 12 large caps. drink water with it!