I’m somewhat surprised how much stuff has to come out to get at that shoulder button, it’s a lot more involved than when I replaced my trigger - but still worth it I think. The ifixit guide is very good.

First thing I did when I bought mine was to open up my Steam Deck and put in a new hard drive.

Most difficult thing was some of the screws felt over-tightened.

That was about it to be honest. I also heard the battery glue is really strong so I’m not looking forward to that in the future for me.