Mentored by a former Bengals head coach that he can imitate to the syllable and recommended by a former Bengals draft pick that first urged him to go into coaching because of his gift for teaching, Nick Eason looks to be an ideal master overseeing the final check-mate on the Bengals record book by tackle Geno Atkins and end Carlos Dunlap. “When he talks to us, he’s talking about the best way to do it because he’s done it,” Dunlap is saying this week about Eason, his new defensive line coach. “On the chalkboard everything looks good and should work within the rules, but pieces move in a real game and he understands that.”