Gregg Hartsuff took out a screwdriver as he worked on a trophy in the bed of his truck, carefully putting the cup back together after disassembling it for the long drive down from Ann Arbor, Mich. It’s a labor of love for the University of Michigan men’s rowing coach, who has led his team to seven straight American Collegiate Rowing Association (ACRA) national championships, including four since the tournament moved to Gainesville. Now, the challenge is making that eight straight this weekend against the largest field of competition in tournament history.