During January 2025, Dzsoftware developed reverse-byte-order support for the fritz_cal_extract tool in the coolsnowwolf/immortalwrt repository, enabling correct processing of calibration data for the AVM FritzBox 7430. The solution involved implementing a reverse option and introducing an intermediate buffer to preserve compatibility with existing forward extraction workflows. Working primarily in C and leveraging expertise in embedded systems and firmware analysis, Dzsoftware addressed data-parsing errors that previously hindered firmware analysis on legacy hardware. This targeted feature improved device compatibility and data integrity, demonstrating a focused and technically sound approach to enhancing firmware tooling for specialized embedded hardware environments.