When the liver is ready to dump - flush. It took me 72 flushes to get to the last of the stones in my liver/gall bladder. For the last 6 months I flushed weekly because I figured I'll never get done otherwise. Each flush was producing between 1/2 to 1 cup and a half of 'stuff'.
The pain in my upper back would get quite bad after 3 or 4 days from stuff moving down that I felt too uncomfortable not to flush. I would say try and see.
:-) Good luck, Giz.