Another of the boat's strengths is, ahem, the strength of the boat. The core of the Grand Soleil 43 is a massive, galvanized stainless-steel grid to which is affixed a formidable steel U-shaped stringer that anchors the chainplates. Likewise, a metal frame within the standard 7-foot-6-inch tapered bulb keel (an 8-foot-6-inch fin, sans bulb, is another option, as is a 6-foot-6-inch shoal version with the bulb intact) is bolted directly to the internal steel frame, the total sum being an integrated structure at the heart of the vessel that uniformly deflects and distributes loads and stress from the keel, mast, and shrouds. All of this serves as the foundation for the hand-laid and vacuum bagged hull and deck, a vinlyester/e-glass composite that sandwiches a foam core. Like the joinery, the glasswork is first rate.