I made a few alterations to the plan as stated, with good results.
First, I took 3 servings of 1 cup grapefruit/epsom instead of 4 3/4 servings.
Second, based on the success my brother had - When it was time to take what would have been the 4th 3/4 serving - instead I took a few tablespoons of apple cider vinegar, a few drops of Christophers blazing cayenne extract in some distilled water. Careful here, you're gut is empty and you will feeeeeel the cayenne, so moderate.
Worked very very well. The mix seems to help squeeze out the liver - I got a nice amount of stones out again.