Saxman,
I actually want to split the current F4U-1A into two peices.
1. F4U-1 May 1943, No ADI, Birdcage canopy and no stall fix.
2. F4U-1A May 1944. 2250HP ADI, Bubble canopy, paddle prop with bars and no pylons for external stores. 367MPH on the deck, 430MPH at 23K no perkies IE priceless.
Every F4U-1/FG-1 in theater at the time would have been retro-fitted at that time and there was at least a thousand of them. It certainly would have been more common than the 109K, G14, KI-84 and F4U-1C.