Here is a basic blueprint. You can place it, deconstruct the whole thing, and then undo to see the error.
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0eNqVkd2KgzAQRt9lrmOJShVy28dYlmJ16A6YUfKzrkjevUlKl+7Wm97NF76cOSQbXEaPsyF2oDagfmIL6mMDS1fuxnTm1hlBATnUIIA7ndI8LWgKu5DrvyAIIB7wB1QZPgUgO3KEd04O65m9vqCJhX2CiNHGSxOnjRFUyMNRwHofIj96MfapYFPj5OUznQZQlYCFDOZZJo2TL/936r+dEMSLYPUrqHEgrwsc415DfTFPI+6ItllT7rHqN1nNAxXt83Orp98R8I3G5nJby7Jp2qo6NiHcADE1lYI=