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In this week\u2019s episode Edd and Mick catch-up after another long hiatus (sorry about that).\nWe start off by discussing principles mentioned in the Clean Coder book, gaining confidence in code by way of tests, and Elon Musk\u2019s dream of putting a person on Mars.\nLeading on from this, Edd talks about his continued venture into the internals of Bitcoin, Hardware wallets, ASIC mining USB sticks and Merkle Trees.\nWe then highlight MyBuilder\u2019s recent switch from dedicated servers to the AWS stack, highlighting the pros n\u2019 cons of both approaches and some gotcha\u2019s encountered along the way.\nFinally, we mention some security audit and monitoring tools that have proven useful for keeping an eye on the (ever increasing) servers present in a typical setup.