Or the 46th or 67th, or even longer. Don't pay any attention to these flushing rules or patterns or the flush one person says will usher in a new period of rejuvenation. Everyone is different and it takes some people far longer than others. It is good to work to targets but you shouldn't mentally prepare yourself for sudden improvement as chances are you will be disappointed. Just flush away and the improvements will steadily come. I've noticed that it's very much a two step forward one step back process so if you do improve you could regress again during the later flushes. In general though you will make steady progress and gradually see less and less stones.