My 2.5 cm stone was in the neck of the gallbladder. This resulted in inflammation and thickening of the wall from 3mm to 42 mm. My symptoms were off and on upper backpain, and pain at the right lower front (never in gallbladder area).
I started liverflushing in feb'03 and after about 10-12 months I had another ultrasound. The infammation was gone and the wall thickness back to normal and the stone was now freefloating.
In '04 and '05 had another ultrasound the stone was still free floating and still the same size. '06 I skipped and next month I am planning to ask for another US, I am basically symptom free.
I do maintenance flushes every few months so I won't create new stones.
I changed my lifestyle with better eating habits in the last 4 years.