The transition from a 450 to a 500 takes the Legacy’s upgraded range and extends it even further to 3,340 nm (with four passengers and NBAA IFR reserves). To make the jump in performance, changes are made to the fuel system, wing structures, flight control systems, and avionics software for the Collins Pro Line Fusion flight deck, and the Praetor’s winglets are added to the Legacy’s wingtips. Specifically, the level-sensing wiring in the fuel tanks is swapped out, the over-the-wing gravity fueling ports and fuel measurement system are relocated, and the wing ribs are beefed up to carry extra weight. Cosmetic changes to logos are also made, and placards are updated as required. The Praetor’s E2VS head-up display combining synthetic and enhanced vision is part of the package as well.