During January 2025, Dzsoftware developed reverse-byte-order support for fritz_cal_extract in the coolsnowwolf/immortalwrt repository, targeting calibration data processing for the AVM FritzBox 7430. By implementing a reverse option and introducing an intermediate buffer, Dzsoftware ensured compatibility with both forward and reverse data extraction workflows. This C-based solution addressed the challenge of parsing firmware calibration data stored in non-standard byte order, reducing data-parsing errors and improving device compatibility. The work demonstrated depth in embedded systems and firmware analysis, enabling more reliable firmware analysis for legacy hardware and enhancing deployment reliability without introducing regressions to existing extraction processes.