So... thanks for the hints, I started from scratch on a different Windows box, and I now successfully flashed the latest global EU version via the XiaomiFlash tool... the device is "up" again.What I would like to know of course is what happened in the first place! With my Xiaomi Mi5s and Mi6 it was always safe to flash the latest firmware ZIP packages from https://xiaomifirmwareupdater.com/ ... I never had an issue. With bei Mi 9T Pro flashing the V10.3.3.0.PFKEUXM (came from V10.3.1.0.PFKEUXM) from within TWRP the device was unbootable afterwards. What would be the correct procedure in case this way isn't possible any longer?Kind regards, mistersixt.