Your testimonials will help a lot of people. I have read many posts regarding people got sick after of the flush and reluctant to try it again. In my opinion, these people are not ready to do the flush, their liver "fluid" are so congested (not enough bile being produce) due to the presence of liver "heat" (toxins, chemical, virus, etc...), which made the flush turn out to be a total nightmare. One method, although not always true, but can be a possible method to used for telling whether you are ready with the flush: If you have a throw-up feeling when taking any kind of oil, that means you are still not ready for the flush. The same kind of feeling you would get during a strong flu sickness.
Your opinion also coincide with how the TCM treats gallstone, clear the "evil heat" away first, and then rejuvenate the liver, or both at the same time. (Did you study TCM theory before?)
I totally agreed with you since I got similar results by just taking the GCG / Chai-Hu, and some other liver tonic herbs such as white peony root, Goji, and Reehmannia Radix, although not in the tincture form, but the real dry herb stuff and in a boiled form.
I also did take a hot bath/shower before the flush and got good results, I knew strong blood circulation is mandatory for a successful flush. I didn't even drink apple juice one time and I still pass a lot of stones (some as big as half my thumb size). If you want, you can see my gallstone pics under Sungrass in the image archive.