A CS is half the size of a CM. Any foods that are legal for CM are legal for CS.

I would cut the diet pop for at least the first two weeks. You want to learn what your body feels like clean. You won't learn that with the diet pop.

You can have plain tea.

You need to make up your mind to do it for two weeks strictly and with all the nit picky rules. Otherwise you can be setting yourself up for failure.

If you could do two weeks induction, you can do two weeks of strict CAD. Afterall, you'll get a RM everyday!!