How low carb are you now? Do you test with a BG meter? I would add a few carbs very slowly (the ones I really love like oranges lol) and test regularly after eating new things. I wish I was just 10 pounds away from my target, well done. Whilst the ND has some merits I think you have chosen the best plan for you in that after the initial very low cal part of ND you still need to watch your diet, and you are doing that already, so you are one step ahead. I think the main thing is to experiment, be vigilant and never get complacent.
I started off eating less than 50 carbs a day for the first couple of months. I eat 70 to 80 carbs a day or so now. I test regularly.