Tuning Guides, Rules, Specifications and Resources North Tuning Guide Doyle Tuning Guide John Ingalls Boat Tuning Seminar Part 1 (June 2024 MYC) John Ingalls Boat Tuning Seminar Part 2 (June 2024 MYC) John Ingalls Post Race Boat Observations (June 2024 MYC) International Yngling Class Rules Rules of Racing Used Boats Available Suppliers Dewolf Boats (John Ingalls) Ensign Spars (Chad Lewis) Dwyer Aluminum Mast Hall Spars Yngling Class and Equipment on World Sailing