Hello mate,
I can't help you out with your decals, but I am curious what kit and conversion set you're using for a 1/72 scale F-5 Lightning.
I'm intending to build a 1/48 scale F-5 Lightning from the Academy kit. Someone kindly sent me the Aeromaster decals for it, but unfortunately the Shark Mouth art isn't consistent with the photographs on www.33rdprs.org , so I may end up painting it on by hand. I usually build 1/72, but decided to go for 1/48 for this because I thought I'd have trouble tracking down the right kit in 72, and I wanted to build one of the aircraft that my wife's grandad flew.
All wars should be fought at 1/72 scale.
Currently working on (very slowly):
Airfix 1/72 Hawker Hurricane Mk1
Amodel 1/72 MiG-9 Fargo
PM Model 1/72 Hawker Sea Fury T-20
Airfix 1/72 WWI tank Mk1
Hasegawa 1/72 Armoured Car Daimler MkII