1 - I was SAD from 0yrs-30yrs old. Then went VLC cold turkey and undoubtedly my caloric intake dropped off a cliff as well. I think that was due to the fact that I didn't know what to eat at first because I hadn't gotten settled in with food choices yet. The first month was very confusing. Was VLC for about 2 months (20g-40g). Then LC for about another 2 months (40g-70g). Re-integrated more carbs in late Decemeber 2010 after about 5 months or so of carb restriction.
2 - White potatoes, white rice, soaked/fermented oats, soaked/fermented beans, raw honey, bananas.
3 - Scaled slowly. Probably took a month to go from ~70g/day to ~150g/day
4 - It depends on how success should be defined. Weight has stayed very steady for me. Even on random carb binges, I do not see any weight gain. Some acute issues were fixed by my new diet vs SAD, like kidney stones. Some acute issues have arisen, like heartburn.
5 - By adding in the fructose (banana/honey)... it may have caused increased production of trigs and/or small dense LDL. Then again, I didn't fast for the test, so CMast says the data is likely skewed.
6 - Easier and more diverse food choices to maintain 'healthy eating'. More enjoyable diet.
7 - I think by default, consuming more carbs lowered fat only. I believe my protein intake has remained steady throughout the adjustments.
To answer the question, I would say yes! I have successfully re-integrated carbs after LC, primarily because the re-integration has not made me gain any additional weight at all. I began at 163lbs on SAD. Cut down to 148lbs at my low in January 2011. When the pics taken on March 19, I was 151 pounds. Since then I have added about 7 more pounds of muscle and I'm back up to 158 with no flab.
As for the other issues that I am still working with, much of it is largely "question marks" and so there is some speculation at this point. I have only one single physical ailment... the unsettling feeling in my chest that comes and goes. On paper, I have a concern about my lipid numbers, particularly that I tested for low HDL at 40 and that my LDL was shown to be primarily small dense pattern B. If I can correct those 3 things... (chest, HDL, LDL type), I will be very happy because otherwise I feel amazing. I'm not a big guy at 5'8" 158, but I'm very strong, muscular, and confident. Very fit and able. Full of energy and zest for life. I think those details are very important because I'm pretty close to feeling optimal in life, which does speak well for eating mostly whole, quality, natural foods in today's world of availability.