I say it your plan makes you feel good, and your comfortable with it, then go for it. You did the initial 10 days, so you should be fine.
Robin Quivers did 3 21 day fasts with 7 day breaks in-between and lost something like 60+ pounds. So I say each person has to reach within themselves and find what works for them. Once your body is Master Cleansed the rest should be icing on the cake (dam - I wish I hadn't a said that) ;)