Black Square / Beechcraft Grand Duke BE60 Airspeed Mod

This mod updates the airspeed indicator on the Black Square Grand Duke BE60 by adjusting the Vmc and Vyse markings. It also modifies the copilot side wall placard to reflect the new values. The modification is designed specifically for the BKSQ Piston Duke, Grand Duke variant. Users are advised to disable the mod when flying the stock Duke model.