Many variants have been made more than the fighter’s lifespan. These have bundled the T-45A, that's a two-seat variant also used by the US Marines, as well as the T-45C, an upgraded Variation with a glass cockpit and other augments, which currently serves for a model for T-45s even now https://lhcathome.cern.ch/lhcathome/show_user.php?userid=1942698