I just noticed that on the dash where the bomb arm is, that it says "Nose Arm" and below it says "Left" and "Right." Which makes sense. However, there is also a "Tail Arm" and "Ready" switch. What do those do? It seems to imply something like a tail bomb? Which doesn't make sense...

Also noticed that the mixture has "Auto Lean" and "Auto Rich" positions! Did the P-51 control it's mixture automatically? That seems like a HUGE advantage!