the dosages they give per day are highly under-estimated. As I told you, I am quite comfortable with 6-8 tsps a day. When your urine gets too dark and concentrated, even while drinking plenty of water (but not the urine of the morning) and having proper diet, only then it is the sign you have to lower the salt index. To me, even with 8 tsps of sole a day, this has never happened. I suggest you to increase the amount gradually, until you feel you've reached the right point.
I saw you follow pretty much the suggestions of Lapis (good choice!), he is also into sole, ask him, probably he would have intersting things to say on the subject.