Maybe you can patch the existing firmware, rather than starting from scratch: https://wiki.samygo.tv/index.php?title=SamyGO_Firmware_Patcher https://wiki.samygo

Maybe you can patch the existing firmware, rather than starting from scratch: https://wiki.samygo.tv/index.php?title=SamyGO_Firmware_Patcher https://wiki.samygo.tv/index.php?title=SamyGO_Firmware_Patch... I'm not sure whether sources are available.