Just thought I would add here that Epsom Salts are included in the protocol as a laxative and also as a means to dilate the biliary tubing to enable the relatively painless passage of (larger) stones. To avoid potential (but apparently uncommon) complications/obstruction I think it is wise to take some Epsom Salts ...they taste disgusting I know, but to me it is a small price to pay, kind of like an insurance policy.
Just my view..
Also, it is my understanding that malic acid can act pre-flush to dissolve some stones but doesn't actually relax/expand bile ducts.
I wish you well in your flushes. I must get back into it myself!!