Just wanted to thank you for the swift reply

Interesting link!
Will look more into the translation and the images - I have a cheap soldering station and horrible soldering skills, but maybe those will be enough provided I can figure out what he's talking about.
EDIT: So, thanks to the title from the link I got this from Baidu:
https://forum.51nb.com/thread-1516974-1-1.html
It seems a little hard mostly because:
(A) the automatic translation makes it confusing to understand whether the guy's talking about the X200 or X200s, or the X61/s, as he jumps from one to the other in his explanation
(B) he's soldering in really tiny spots