My story is somewhat similar. Started flushing 4 or 5 years ago.
I would be consistent for a while and stop.
Never really keeping the schedule of a flush every 2 to 4 weeks until the job is done.
Right now I've been on schedule for probably six months.
I wonder to what degree the liver makes more stones because it isn't cleaned out. As in during times of six months or so without a flush.
In other words, I wonder if it can be somewhat of an endless process if the project isn't taken to completion on a continuous basis.
Some of the stones I've been getting out recently look awfully new.
What I've read is that it should be taken to a point where you get two or three flushes without any more stones coming out.
And at that point the liver should be clean of stones and anything else.