Later during Korean war it turned out that Corsair with .50s was serviceable in hangar of small CVEs, like USS Sicily, since it was possible to make all maintenance on .50s while wings were folded. 20 mm in turn claimed spreaded wings, which was possible on a flight deck only, during winter snowstorms, so eventually CVEs over there hosted Corsairs armed with .50s only.
Finns then had another airplane with quite controversial history in USN service, Brewster Buffalo, but with reassembled motors (all the original bearings were substituted with German ones) and rearmed with four Sweden Bofors .50s, and some of them, say WO Ilmary Yuutilainen or Capt Hans Wind, had 30+ kills piloting Buffalo. Even armored IL-2s were often the easy prey for Finn Buffalo over Baltic Sea - when hit in oil cooler underbelly, IL-2 became a bonfire in a seconds, but for this result the Buffalo should fire from the sea level literally. It seems that general success both Aircobra and Buffalo achieved over European fronts is mostly linked to very moderate heights of majority of dogfights where both were good enough, and the good radio which allowed seasoned pilots (both Soviets and Finns) to fuck the book tactics off and create their own from what they had in hand.