My first attempt at making a vegetable juice is this one called V-6:
RECIPE FOR COOKING MITCH'S V-6 VEGETABLE JUICE
1 cup cilantro
1/3 cucumber
2 medium tomatoes
1/3 bell pepper
2 medium stalks celery
6 medium carrots
I used a red bell pepper and baby carrots, but for the most part not bad at all. I added some tabasco to make it spicy, perhaps too spicy.
It does produce a lot of pulp, so perhaps the greens+ replacement is valid. It may be doable through a dehydrator or perhaps on a cookie sheet in a low temp oven.