yes I'm aware of the currant damage model, but when you compare this to actual gun cam footage even from a 50cal. they are worlds apart visually, aircraft break up in a far more dynamic way as apposed to a set break point at the tail of a P51 or wing root of the spit. the functionality aspect is there yes, but it does not feel like the 20s pack the punch that they should, the fact that when on someone's 6 a 20mm can not travel the length of the thin skinned aircraft is quite frankly not great, it would absolutely tare though causing spall. the 30mm of the 109 has a set explosive radius, it seems the explosive effect of the 20mm HIE round hardly even is present, you overly rely on a lucky shot - thus my suggestion to buff the damage output of the 20s