Chimp, SA2, I checked out your films. They're pretty good.
If it's not too forward of me, Chimp, I have to say you're not leading enough on high deflection shots. You need to fire sooner than you do when the enemy is about to zoom past your gunsite. You're pressing the trigger when the site image isn't correct. Other shots you seem good with, but on those 90-degree straight-down into the plane shots, you need to fire sooner.
SA2, I liked your 3rd film best. That is to say, I started out hating it (15 minutes of nothing, followed by 7 minutes of good fighting), but once the action started with that oblivious 110 kill, I thought it was the best of the lot.