Dont worry too much. I still loose sight of the bandit too.
I set the gunsight well zoomed in so that I can just see essential instruments. The other views are best zoomed well out, especially the rearward ones.
I find the most useful view when tracking a bandit in a turn is left/right and up.
Hat switch is essential with a button mapped for "up". Looking straight up when turning is useful at times too.
The hardest thing is tracking a bandit in a climb or turn where he drops under your nose all the time.
I'm rabbitting on. There are much better pilots than me out on the boards who will help you. Just look at my rank!:rolleyes:
Good luck:D