Here : https://forum.xda-developers.com/poco-f1/how-to/how-to-transform-pocophone-f1-to-pixel-t3910187
Here is my (updated) dig on AOSP vs CAF. I decided to test the CAF edition once again and this time it did not disappoint me!
Note: I wiped and formatted to start afresh:
Audio quality through headphone and speaker both seems better in CAF...
Disclaimer: The moment you unlocked the bootloader of your phone you choose a risky path, don’t blame others if something goes wrong. Flashing custom software and tweaking things are risky business, don’t do it if you don’t know what you are...
Updated post here:
Here is my experience with latest "PixelExperience_caf_beryllium-9.0-20190709-1839-OFFICIAL.zip" paired with stable vendor-firmware "xiaomi.eu_multi_POCOF1_V10.3.5.0-ven-firm.zip" and stock/"kernel-xiaomi.eu_multi_POCOF1_V10.3.5.0-ak3.zip" kernel ...