Looks interesting but why a BF109E vs later cannon armed Spitfire? Is it Battle of Britain? The trouble with a lot of war films even with CGI is the historical match ups are not correct. 
Yes, you are absolutely right!
I wonder why film makers don't ask an expert before...I think that many would do it even for free !!!
There are many things which must be forgiven in this short movie: the stick of Spitfire, the bullets a little too "short" , unlikely glide and land without half wing...
but director made a good work because the cutting and the points of view are realistic: planes are filmed like if the camera was on another plane and using a strong zoom, or like if the filming plane followed other planes; scenes from cockpit are plausibles (through cutting the director skilfully avoid the mistake of "not changing shadows" in cockpit during flight action)
In movies using CGI sometimes it seems like if tracking shots were filmed from a dolly placed in midair, and some shots from a still camera fixed in the sky: all without the smallest vibration, of course.
