Well, he might have finished 3 or better had he ran a different tire. Run what works for you, not the other guy. Woody has thousands of laps in his XF and can be of good help if you listen...no side wall isn't something I would want to run if autocrossing...nothing less than 35 for me...good luck either way, we are trying to help...There are several autocrosser's on here...some solo... I would love that 305 for drag racing...