D.H.
ALWAYS get an attorney for these types of things.........that way, there are no loopholes if the Mom decides to change her mind or she is trying to be vendictive in some way...........you want it all legal and right.........
Congrats! My X's wife wouldn't give up the rights even tho the kids lived with us........she made their life miserable by coming in and out of their lives and there wasn't anything I could do about it....
Take care and Have a great Thanksgiving.