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Create a comprehensive and structured workbook for skydiving, BASE, wingsuits, and dropzones. The system should be organized into logical sheets with standardized columns, using skydiver language and minimal redundancy. It will serve as a verified, updatable source of truth for equipment details, compatibility, market values, progression paths, and operational references, including dropzone data with magnetic declination rules. The goal is a compact but detailed system for logging, research, purchasing, coaching, and trip planning.