[SEE]

I say 21k because we engaged at high altitude twice and the fights were good - I imagine its more difficult to go vertical (to the extent where the BF can climb vertically, seemingly for ever and ever) at that altitude. The other encounter was at around 18k but he can still (and does use) the vertical climb superiority of the BF to get a solution - in my case a forced bailout as he swiped my controls in a single short burst.

Last night I emptied all my rounds into his E1 and he still killed me! - I was gutted as I stared into my Black screen - a few seconds later his E1 hit the deck and it was 1 pilot kill each - I felt much better! Had a brief exchange of chat afterwards and he is a very nice guy as well as an outstanding pilot!

I learn more from him and the good BF pilots so don't mind getting swiped - it's how you learn.