Installing 16 gig ram on a 13 inch macbook pro. Is a description needed?

Question

macbook

I myself have a MacBook Pro 13 "Early 2011 with 4 gigs of RAM, at that time the youngest model. The apple website states that the maximum memory size is 8 gigs. But recently I found out about the possibility of installing 16 gigs, and today I installed it. It turns out quite budget, if we talk about prices for apple-components, and I'm happy as hell with the result :)
I understand that this doesn't make for a full-fledged article, but I want to convey it to people.

Answer 1

If YouTube is not lying, then it is enough to unscrew a few screws and replace the memory with 2 8 GB modules. I do not see any special science in this, worthy of a separate post.
Or am I wrong and need to solder something?

Answer 2

I have only one question: "why more than 8 gigs of memory on the machine"?