On the note of replicas, I have been able to make a Mitsubishi A6M "Zero" replica run around 330 mph (~150 m/s in ksp at max.) along with proper weaponry using Aviator's Arsenal (2 20mm cannons, .30cal machine guns. I have yet to add the 30/60kg bombs however). I hope to get a craft file out, however it requires a few mods.
(Note 1: Pictures will come out soon)
(Note 2: I am still tweaking my Grumman F6F-5 Hellcat, so expect it in the future )