Hi Adj, I tried the "Classic Coke" flush last night - first flush ever. I found that the taste didn't bother me at all so maybe the Coke does help with that.
The flush was successful and I eliminated many waxy green "gemstone"-like pebbles and "rocks" in the morning. (I wondered how effective it would be to flush without Epsom Salt since I thought the salts dilated the ducts but I had no problems with pain or blockage.)
I imagine since we used to used to use Coke to clean our car battery the acid in it is probably pretty strong! You can clean silver by soaking it in Coke too. God only knows what it does to the rest of you - never mind the gallstones! :)