In my previous post/opinion P-DEX the mig wasnt actually researched, the 1 day research i suggested was into what aircraft were availabe at this time on the planet that could be fitted to be the best heavy weapon aircraft.
the research would find that the mig was that aircraft,then after you buy one and it is delivered to your base it would need to be armed with those weapons seen as the most powerful. so it would also need time to be rearmed after it gets to base.
also the mig needs to become available at or very near the time corvett start showing up, not 2 months in to the war.
cold war erra, yes. nations didnt want to share tech, yes.
but a common overpowering enemy has a tendency to make common beliefe bend a little bit, no matter how riggid it is.