MINDEN - It was Carson High head coach Nathan Tolbert's first rivalry game as a head coach and the same for sophomore guard Madison Preston. No doubt both are glad to get it out of the way."I was nervous at first," Preston said."I can say my chest was a little tight," Tolbert admitted after the game. "It was a lot closer than it had to be."Preston may have been jittery in the first half, but she showed calmness beyond her years, pouring in 15 of her 21 points in the final 16 minutes to help the Senators to a 54-51 …