Good morning,
this website
http://www.warbirdforum.com/midwayx.htm
which refers to Frank's and Barrett's books acknowledges the five F2A kills of Humberd, Kunz and White.
It indicates that McCarthy flew an F4F on 4Jun1942 and attributes a fully Mavis kills to Neefuss on 10Apr1942.
Frank, when ou talk to Barrett Tillman could you ask him what how many kills the US Americans scored in the F2A in total ?
I wish you a good start into the new week,
Michael