I agree with you John. When you take the magnesium (and it is of course my guess, but from my experience) the stones try to move causing pain if there is not enough room or enough energy or bile to move them out. Sounds like a plan to try more mag oxide or Magnesium citrate. I tried it last night the evening of the day after my 5th flush and this morning a lot of stones came out when I had hardly any the day after my flush.
Lynn