How do you replace your keyboard yourself?

Have sticky keys?

Spilled some thing on your keyboard and now need to replace it?

Is it advisable to get the keyboard part and do it yourself?

What does this entail?

Macstore says that you need to replace the entire topcase for even 1 sticky or unresponsive key on your keyboard.

But would it work just as well to only buy the keyboard.

I have a Macbook Air 11" model A1370 2010 and am wondering if a keyboard from the same model from 2011 would work just the same or if the difference in year matters.

It would be fantastic to see a video of this procedure!