Pretty sure it's just a matter of getting X220 palmrest/plastic trim surround to avoid any alterations. You can find writeups via the obvious searches, here's

Pretty sure it's just a matter of getting X220 palmrest/plastic trim surround to avoid any alterations. You can find writeups via the obvious searches, here's some such results: https://www.thinkwiki.org/wiki/Install_Classic_Keyboard_on_xx30_Series_ThinkPads https://www.thinkwiki.org/wiki/Install_Classic_Keyboard_on_x... https://www.reddit.com/r/thinkpad/comments/9cp8pq/x230x220_keyboard_swap_first_impressions_install/ https://www.reddit.com/r/thinkpad/comments/9cp8pq/x230x220_k... https://www.youtube.com/watch?v=t4_6LQrmu14 https://www.youtube.com/watch?v=t4_6LQrmu14