A good post as usual. I wonder if you are still making new stones. Eventually the making of stones may be can't keep up with your good flushes :) and you might be able to go on maintenance.
Indeed it is good when we start that we don't know how long it might take. I am an exception but it is 3 years. Though I must say flushing is no big deal anymore it is like a regular day in my life, like a haircut or brushing your teeth.
And the big benefit is that there are so many little healthproblems which all disappear and you feel so much better.