Hi !
Congratulations on your 40 day Master Cleanse.
Think you may have to do some researching with the excellent CZ search engine. Unless of course some one writes back and answers your questions.
I remember reading - a long time back - that
a) Master-Cleanse is for Cleansing the blood and your body in general. i.e. not necessarily for losing weight.
b) Liver Flushes should not be done during the fast (cannot remember the exact reason why) - may be at the beginning.

If you check some Master-Cleanse Blogs there is excellent advice there as well. Sorry I could´nt help in a more constructive way!