The F/A-18E Super Hornet was developed from the F/A-18 Hornet. To extend the aircraft range, the interior fuel tank was enlarged which requiered an 86cm lenghteniing in the overall fuselage. The resulting increase in the aircraft lenght and weight requiered a more powerful engine. Also the wings were lengthened and surface area enlarge in order to increase lift.
I've used the amazing tutorial of Gary Wickham in order to do the "In Flight" position. Check his Mounting Models in Stand Tutorial here and navigate to References.