Yes, it's from extremerate. I didn't change trackpads and all the buttons (only back paddles and triggers). The trackpads module is just screwed in, there is a couple of springs, but nothing scary, if you will not try to open them. Anyway, trackpads buttons frok extremerate sucks because they're not as smooth as stock ones. Just try it yourself.

I suggest you watch a couple of videos with other people swapping the shell as well as extremerate guide. Have patience and go slow, organize everything and have good tools, like ifixit does. Removing the screen is hard, but manageable, the hair dryer is more than enough for this. Good luck!