Firmware 비교- https://blog.dronetrest.com/eachine-pro58-firmware-mashup-which-is-better/ Achilles firmware (11 EUR)- https://achillesfpv.eu/ Pirix (free)- https://pirxfpv.com/ WPro58 (free)- https://github.com/piodabro/WPro58/releases for OSD Mod- https://achillesfpv.eu/osd/- https://www.youtube.com/watch?v=pHTMI06zC-s&feature=youtu.be how to flash (need ST Link V2)- https://blog.dronetrest.com/h..