In my opion, if it matters, I would only buy a race car after I seen it run down the track. That way there is no problems. or BS on how fast, goes straight, this, that or the other thing. If im shelling out 15,000 I want to see proff, unless your buying a roller then thats different, then you take a buddy with you and a tape measure and make sure everything is straight and squared up and 4 eyes are better then 2, Thats my 2 cents