:D
really?, only a speculation?, you should see my sigpic SD ;) (everything is subject to change)
A total of 1,400 Tiger IIs were built before production ended in 1987.
More than 3,800 F-5 and T-38 Talon trainer aircraft were produced.
The F-5N/F/E variants are in service with the United States Navy and United States Marine Corps as an adversary trainer (for USAF F-22 pilots as well).
Approximately 500 aircraft are still in service as of 2015.
otherwise F-5 is relatively easy to model, similar to the MiG-21 in many respects (fine adversary aircraft)
a perfect step/transition between L-39 and F-18 imho (in perspective of ED)