In the same flush (my 8th, my 3rd flush with no epsoms), I passed 2 other stones ALMOST that size, plus about 250 stones the size of chickpeas.
BUT, I realize that you had many, many, health issues that I don't have Hopinso.
Magnesium citrate works just fine for me. I've done 3 different kinds of flushes, and I find that no epsoms with magnesium citrate upon waking works very well. Of course I do an enema and add extra fiber.
But overall, the magnesium citrate seems to work excellent. People with gallbladders and livers full of stones might feel comfortable using a little bit of epsoms (FSBoiera uses one tablespoon before he does the Julia Chang flush version). But he doesn't use anymore than that.