P40Es were capped in frame 1 (24 I believe). P40Bs were not available since frame 1 represent just Australian forces and the Aussies never flew the P40B.
Frame 2 represents USAAF and Aussie forces. So I scaled back the cap on the P40E to 16, after going over the results on frame 1 (cut back by 8), and then gave the allies the P40B to represent P39s, P400s, etc. of the USAAF in the theater.
Allies still also have the F4F.