Overview
I didn't like the stock CTS emblem so I decided to replace it with an LS6 one. It's an easy install, but here are some tips to make it look good.
The Installation
Here are a couple of pictures of stock.


Tape around the existing emblem so you have a guide for where to place the new one.

Use dental floss to remove old emblem

Wash area before putting on new emblem.

Install new emblem using tape as a guide.

That's it, remove the tape, wash the area off and you are done.

