Shudder
http://trainers.hitechcreations.com/files/ghosth/default.bmpIn my opinion, the less between my eyeball and the enemy the better.
That includes tracers, and gunsights.
Come to the TA, spend a week turning the lead computing gunsight on & off as you follow people.
Pick one plane, and set of guns and stick with it till you can hit every time. Only once you have it mastered should you allow yourself to experiment with a different plane and set of guns.
If at any point things get screwed up you go right back to the basics.
Get behind them
Anticipate their next move
Watch their wings (they'll tell you where he's going before he goes there)
Lead (sometimes this means pulling lots of lead, sometimes your better to hang back in lag pursuit and wait till he quits flopping around)
Range is important, don't try to get killing shots at 600 +
With cannons closer is much better, plus the target is 4X easier to hit at 200 than it is at 600.