Lex, awesome journal... Is it possible that your stones were formed many years ago and have only now been dislodged and are wreaking havoc? In other words, is it possible that your current diet is not to blame but your previous one is?
That's one possibility, but other ZCers have also reported kidney stones or urinary tract infections (which can be caused by kidney stones) and a study found that a ketogenic diet was associated with a high rate of kidney stones in subjects that were chronically dehydrated (though the ketogenic diet in that study was not exactly what any of us are eating), and Lex reported that he had been drinking very little water before he got the kidney stones and his specific gravity numbers suggested significant dehydration. All this has been discussed in the forum before, so if you do a lot of searching and reading of past threads you should find more info.
Paleophil, I am having constipation after 5 months also. It seems I did not have this problem for a couple months earlier this year and the only difference I can think of is I was eating a lot of salt on my meat. I am going to try adding in 1 gram of salt a day to my diet and see if my digestion improves. If that doesn't work then I think I am giving up on zero carb and I am going to try a little raw Sauerkraut every morning.....
Dr. Jay Wortman does recommend adding salt for carnivores to avoid constipation, which I have reported elsewhere and I think I supplied a link. I have been trying to remember to add salt, but I often forget, because I'm not a big fan of it. I do include salt-rich kelp in my diet. So far, no noticeable improvements from the salt or kelp, even when I tried ingesting large amounts by drinking salt dissolved into hot water or tea.