GlassJaw,
a few things to consider and also practice.........Ren is renowned for being one to advocate quality stick time ( ie.getting in good quality practice time, with a knowledgable Old Vet or a Trainer helps )
now talking in reference to what you view vs what FX1 views when making a deflection shot. the "elite" snapshooters/snipers/deflection shooters have flown many many many flights and have developed something that MWL sort of eluded to, muscle memory...but the muscle in question is actually your Brain......
Instead of watching the icon count down or count up, and looking or waiting for the opponent to break in any direction to give you a broader target surface to shoot at...thes elite shooter types have disceplined their brains and store "MENTAL IMAGES/PICTURES" of what size the actual plane is in their bore sights...... these little but highly important mental pictures are what triggers their other muscle's memory----> the trigger finger.......
hope I explaining this clearly for you, but what FX1 is seeing , is a mental picture of an opponents plane size in his bore sight/piper.....regardless if it is going in any direction, his mind has evaluated and stored that plane size in to his brain's memory banks.so it becomes second nature when he comes across any plane that offers him this shot.....
the more you fly and the more you shoot, especially shooting deflection shots/snapshots..the more your mind will develope this mental picture and the more accurate you will become......
the other side of this discussion is, although you are looking at a film from FX1, he has his views set for his preferences, how can you be absolutely sure that the settings you are using in the film viewer are set identically to his? that point right there could be the whole difference in the world...
still though, forget about what the icon counter says, and start developing the mental pictures on what your eyes/mind sees when you make a knock down blow with a deflection shot.......
hope this helps ~S~