According to Jim Cullen of North, who sailed on Sea Biscuit, 1, 2, 3, & 5 were all North with Doyle 4th. I understand White and Zephyr both had 'sharkskin' mains. White used Quantum at Cedar Point in 1998, no respect had all UK while winning in 1999 at Annapolis, and 2000 winner Sea Biscuit has been a long time North customer.