It says something about the phosfood but you still need the Epsom Salts for the relaxing of the ducts.
If you dislike ES take at least one drink before you do the flush. Whatever cleanse I do I always use ES beforehand. And if you are sure that you have calcified stones I would not skip the Epsom Salts .
The only thing is that most people here don't have calcified stones, so the soft stones might get somewhat dissolved.
Again I know people that have done this flush but because from an ultrasound they knew they had calcified stones, they at least added 1 epsom salts before the flush.
Even HC says somewhere do not skip the 8 pm one, but you can skip at 6 pm.