Have you been using lots of Gold Coin Grass in tincture form?
I've carried out over 60 flushes and there were times when I would flush ten times with not results as the stone at the front was too big to let the others pass.
I then switched from high doses of malic acid to Gold Coin Grass in tincture form.
Within two days of taking it, I had a reduction in symptoms, as if the stones had either softened and shrunk or crushed into smaller pieces.
The two flushes since I started on Gold Coin Grass yielded tons of gravel, crushed stones and big huge stones - I am amazed at how powerful this stuff is.
It almost has an alcohol bitterness to it and those properties seem to just melt cholesterol-based stones into butter!