While sorting the collection, I am building P51 Mustangs.
I built one as a captured by the Germans version.
So far I have completed two USAAF versions.
There are kits from Hasagawa, Airfix, Matchbox, Academy, Ace, in 1/72nd scale.
By building a group of kits at the same time, I can build them faster, as I can work on one, let it dry while I work on another. Also I can avoid having to look to carefully at the instructions more than a couple times.