I'm glad other people have figured this stuff out too, I knew I couldn't be the only one. Unfortunately most people I know who own the Jeff don't fly it to the fullest. I love "skating" behind mountains. Once the Jeff is below 75% fuel or so it can sustain high alpha turns really well, you can fly over mountain peaks at around 120kts or lower, you just have to get a "feel" for it.
60% of my kills come from skating around mountains for extended periods of time. Once the enemy flies close enough I'll quickly acquire them with the "lock everything in the HUD" mode.