I haven't seen any posts covering these:
1: In numerous books about air combat,I read that if you fire the guns for more than 5 seconds the barrels will melt. Aces High let's you fire continuosly for as much as you want.
2: Autotrim on level works even when the pilot is wounded and has blacked out. I have used this 'feature' many times when my pilot was wounded,especially when landing/ditching.