I agree completely. But I still think Dick's purpose-built vertical diving dragsters idea has merit, assuming they both have the drag devices to keep right at Vne in a vertical dive. The both reach Vne quickly, but the lighter one a little quicker. Now they are both at the same speed straight down, but the lighter one is a little ahead. Now the only way the heavier one can win is if the ligher one slows down (or breaks up).