@thinkpadmuseum @nikhotmsk Possibly you already saw these articles 
First, about soldering expansion board for 2K display, installing new WiFi card with an external antenna, three hard drives (2 SSD, 1 HDD, overall capacity is near 1.2 TB), physically swapping Left Ctrl with Fn and sewing a leather case for the laptop: https://eugene-andrienko.com/it/2024/07/07/thinkpad-x220-second-life.html
Second and 3rd, about #Libreboot on the laptop: https://eugene-andrienko.com/it/2024/12/21/thinkpad-x220-libreboot.html , https://eugene-andrienko.com/it/2025/07/09/update-libreboot-to-25-06.html