As for others line. Depends. No set rule.If car infront of you goes straight as arrow,xxxx then use it. Bare spots or mushy track factor in more than anything else. Some times track is sticky as xxxx but you can mash it with thuimb, sucks. Some times sticky but short distance out. I have run a few track where I have lined the driver up crokked telling him I was doing so because a local I knew told me only way to get down the track.it worked. Like I said no set rule and just a learned thing. Limited info on a FED but it is totally different animal I am told and getting tune for track correct I agree with that statement.