I've made and sold many Xbags and they really aren't pockets, there are 3 sections with the middle one being the biggest. I have added small pockets from the excess material to keep my cell phone and keys from falling to the bottom of the bag. I have put them on either the inside or the outside and they should be sewn on when while the two sections are only attached at the strap and the rest of the bag is flat. I used pre-quilted two sided fabric on a couple and they come out really nice. Good luck with the pattern.
pre quilted
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pre quilted
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three made with home dec fabrics
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