I also watched the startup of the Czech jet, and others, it looks and sounds excellent. Now I am going to get myself a nice Osprey book on the A-4's if such exists, and look at videos on the plane. It is my fave jet from the days gone by beside the Mig 25 and Mig 21. My all time plane is the F-15E. However I have a keen disposition for the Skyhawks, you are right about the noisy engine, and smokey contrails! I was always fascinated by these during the South Atlantic campaign, and in IDF service.. I also am checking the Brazilian Skyhawks (days are numbered). The Argentinian fighting Hawks are fun, but i love the old ones that were serving in the war...on the V de Mayo. One more thing, the Kiwi Skyhawk heritage is fascinating to say the least, legendary and stellar service. A credit to the A.F and the pilots who served on such a classic pocket rocket jet.