I've unlocked my Poco F3 some time ago but stayed on Stock, till this WE i finally went for xiaomi.eu_multi_HMK40_POCOF3_22.1.19_v13-12-fastboot
First Round i went with windows_fastboot_update_rom.bat, but during start i always land in the Main Menu of "MIUI Recovery 5.0". Rebooting or Save Mode didn't work.
Second Round i used windows_fastboot_first_install_with_data_format.bat, which also claims to have sucessfully finished after Total time: 153.988s, but also sends me into Bootloop.
Third Round i was thinking that maybe the Weekly wasn't so good of a idea and went for the "Stable Release" xiaomi.eu_multi_HMK40_POCOF3_V13.0.2.0.SKHCNXM_v13-12-fastboot.zip in hopes to have more Luck.
After going with windows_fastboot_first_install_with_data_format.bat again everything finished sucessfully... and HEUREKA! ITS ALIVE!!!
Phew, i was seriously worried for half of my Weekend. Just in case another catches a Bootloop on 22.1.12 -> go for Stable Release!