I have never worked with fuel tank fittings before so this may sound like a dumb question. I'm building an RV-8. The fuel pickup tube fitting is supposed to have an anti rotation bracket, but the plans do not indicate one for the vent line. I read somewhere that rotation is not as much of a concern when the fixed nut part of the fitting is outside of the tank (as it is on the vent line fitting) because you can hold it in place with a second wrench when tightening down the line. Even if that's true, would it be safer to have an anti rotation bracket on the vent line fitting just in case so the seal doesn't get broken at some point?