Have you managed to find a solution? I flashed the wrong image and got a non funciotional device. USB led turns on for about two seconds and then turns off. Serial port is non functional. Not sure if soldering/unsoldering is needed. @Murchic and @root, could you be more specific? I got a SOIC8 clip and wrote a c20v1 flash dump (EU version) I got somewhere here on this forum. However, nothing changed.