From a personal viewpoint, I believe that the F-20 Tigershark should have gone ahead. In 1v1 air to air, small is beautiful. Great loadout on the L-39 as well.
No as the Americans made th F-16 more "avaliable" to other countries, the F-16 wasn't an "orphan" aircraft (ie the USAF used it) and arguably the F-16 was superior. In saying that I have soft spot for F20
This is not the typical L-39-Trainer. This one look like a L-39ZA with with the a gun container GScha-23L, and UB-16-57UMP -Rocket tube launch container with 16 unguided S-5 air-to-surface rockets in 57 mm caliber