BTW, as a career Navy guy, my enlisted and officer flights include 12 different aircraft:
C-12, B-200, C-2A, UH-3A, T-34C, T-1, T-39N & G, EA-6B, S-3B, F-4, F/A-18F. This doesn’t included flying a friend’s Cessna or my other friend’s T-34A.
So, 44 as a test pilot isn’t that unusual.