Congrats on your phenomenal loss Swedishgirl!
As for being on the full fast for longer than six months, Nancy should be able to offer you some good advice since she did the full fast for seven months.
I don't think I will do the full fast for longer than 5-6 months. After this, I will switch to a modified plan because I want to get back into my intense workout routines, which will be much easier, and funner, with 100lbs gone!
Maybe switching to the modified plan for a month or so, and then switching back to the full plan will shake your metabolism up and you can lose your remaining weight at a faster, similar pace as to when you first began (which, of course, won't be as much weight per week because you are significantly smaller now and will lose less weight per week as you did when you were 100lbs heavier, but still will be more than what it might be now, if it has now slowed down to 1-2lbs a week or so).
Good luck to you and thanks for inspiring us all
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Sheryl