I put (organic) lemons through with their skin but would not put a mango with the skin because of it's relation to the poison ivy family (if you search for "mango" you will find this info in some posts from March and April).
I use my juicer primarily for juicing (WG, various greens, apples, oranges, pinepapple) and occasionally for making fresh fruit sorbet (in goes the frozen fruit, and VOILA out comes yummy dessert) or banana ice cream. I haven't had much success with doing nut butters in this machine so I'll be trying that in the Champion later on today.
EC
Proud Graduate of:
Alissa Cohen's First 12 Hour Chef Training at Grezzo Restaurant (Boston) - February, 2009
Associate Chef & Instructor Training, Living Light Culinary Arts Institute (Ft. Bragg, California) - March, 2009