With its proud bow, classic Downeast lines and elegant fit and finish, the Mark Ellis-designed Bruckmann Abaco 40 offers a combination of traditional appeal with modern performance. Designed as a single-diesel weekender, the Bruckmann 40 is a master of salty understatement, although it tops out at about 30 knots and only sips about a gallon a mile at cruising speed of 24 knots. Based in Toronto, Canada, Bruckmann Yachts is a high-end sailboat builder, and that heritage shows in the Abaco 40; there’s nothing fancy here, just everything you need in just the right place. From the cockpit, you enter…