You don't need to send me anything. :)
I mean, you could send your old black dock and back plate as a nice gesture (I may have some use for them), but it's definitely not a must.
Hey. If you are comfortable using a screwdriver and have 15-20 minutes to spare then you don't need to send me your Switch at all. I'll just send you the stuff and you can apply it yourself.
I know that "changing the backplate" might seem scary, but these are seriously easy on the Switch. I'll...