I just stumbled upon your message and I saw that you wrote you had a flush which was stone free and you were now done.
I am getting ready to do my 25th flush (in 2yrs) and I have had many stone free flushes however from my understanding you are not "done" until you are CLEAR (which means NOTHING IS EXPELLED.....no coloration of any kind)
After I have a stone free flush I then have a flush that isn't stone free.