Originally Posted by Iloudsan
So am good to go ?
Sorry for my bad English
If you can achieve S-OFF you should be good to return 100% stock with a .401 RUU with bootloader in a LOCKED state and no tempered warning (again with that guide you linked).
The problem is that you might not be able to achieve s-off (some users reported problem to s-off) and you will only know when you'll try it and a this moment you'll already be rooted/unlocked (s-off required root).
So the decision is yours, there is always a risk of loosing warranty.