To use or not to use

I would also recommend running the dust cover.it's there for a specific purpose as stated above,and on the bolt heads,I have ground many down and also have gotten thinner[headed] ones...always use locktite on the bolt threads...does make quite a racket with thick bolts and sounds like the whole bottom end is fixing to come out,will scare the **** out of ya...but simple fix and common prob...