This is by no means a priority request but it does appear that there are a few aircraft that are incorrectly armed. There may be good reasons for this but I wanted to pose the question.
My focus is on the Yak-9UT which there is unfortunately not very many resources out there on. The in-game version has a pair of ShVAK 20mm cannons in the nose and a single 37mm cannon in the hub mount which IL-2 Compare lists as Sh37ki. Although difficult to track details... we *think* that the correct armament should be two B-20S cannons in the nose (instead of the ShVAK) and one NS-23 cannon in the hub mount.
The discussion that we had was here:
http://forum.1cpublishing.eu/showthread.php?t=17554
Also that indicates that there are a number of other types with incorrect armament. The Ki-43-II has Browning .50cals when they probably should be the same Ho103 as in the Ki-61 and Ki-100. The J2M3 and M5 aren't quite right either.
I didn't know some of this until just recently. References difficult but some are probably more obvious than others.