Yeah the breather tube did not need anything additional, its fine.
Mine is dropped about 2inches and I have completely lost the vibration noise that was almost constant when I did not have my diff dropped. By far my favorite mod.

I have some vertical welds and have without a doubt tested them to the max already. Actualy the text occured the day after the install. They are holding up just fine, thus far. If they fail I will just get new ones.