Battery Diagram Verification

Howdy esk8ers, I am getting ready to put together my first battery pack and would like some input to verify if my idea works. I saw a video where a guy assembled a pack in this manner and I liked how the pack was a) flat and b) flexible. After assembly I was planning on wrapping everything in kapton tape for insulation, maybe add some more fish paper, depends on how paranoid I am. Other than verifying my idea, any tips for a first timer would be appreciated.

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