I did it with my X220 last year, it was almost painless because there are several tutorials that I could reference. There were two downsides, Windows 11 cannot

I did it with my X220 last year, it was almost painless because there are several tutorials that I could reference. There were two downsides, Windows 11 cannot sleep, or rather it sleeps but cannot wake up anymore, and you cannot adjust permanently the default drive (I believe you can if you reflash). For people using Linux it works perfectly, and accessing the chip is quite easy, you don’t need a full disassemble.