Alright! Finally succeeded in getting S-Off with Facepalm. I have run the official RUU for 3.16.651.16 and then got the OTA update to 3.16.651.3. I had to call Customer Service to fix an Error 16, but it works now.
I guess the question now is, is it worth upgrading to 4.13? I know it's not hard, but downgrading seems like a pain if I don't like it or it doesn't work well.
EDIT: Nevermind, I see that it's pretty easy if I use VipeRUU or even the stock RUU. Thanks for all of the help guys!
Last edited by dante042; 20th August 2014 at 10:12 PM.