Ding; You are comparing SC 20TR base rating(no spin, pin head main) to that of the optimized Tornado. Hence, a big rating difference. If we add the spin and square top mods to the SC 20TR, I think the numbers get alot closer. Still, light to medium air, the SC 20 TR rating is gravy. Heavy air, and I think the T's rating is pretty sweet. Anyway, who said portsmoth rating/racing is fair?