While looking at AM P-51B I stumbled across spent cartridge chutes. Pictures I have access to (D&S, In Action, Walk Around) show a bit different arrangement of the openings than what's in the kit - one large and two small ones. I initially assumed that the large one is for cartridges and the small ones for belt links, but that doesn't fit all that well; these small holes seem to be staggered differently then the guns. Could someone enlighten me as to the purpose of these three openings? Also: were they the same on the British version (Mustang III)?
While going through books I've also noticed that P-51D has three larger openings per wing, but only two small ones. Does someone know what these small ones were for? Or why were there only two of them?