It’s not unusual for DCB Performance Marine to deliver a new catamaran at its Owners Regatta, which opens Thursday in Lake Havasu City, Ariz., with registration and a welcome party ahead of Friday’s lunch run and dinner celebration. It happens almost every year. That tradition will continue with the delivery of an M37R to Dan Kuhn of Cape Coral, Fla., who will be joined by his significant other, Linda Harrill, and brother, Robert.