As it is your body to do with what you wish, there is no magical "ceiling" to dosing HCl. You can take more until you get to the "hot tea" sensation. As HCl is a "normal" part of the stomach environment, it isn't a problem unless someone takes too much. If you slowly raise the dose a pill (or a 1/2 pill) at a time, you should know when you reach the upper end of your stomach's tolerance.
Another thing to watch for is if you stopped taking it when it runs out and symptoms re-appear or you feel differently (better or worse). Sometimes we take "disappeared" symptoms for granted and don't realize they are gone until they come back.
As for your search issues, I don't know, are you searching on this board or another search engine?