I've been using your liftlines for the last couple of weeks, and I found them to be very helpful. Much better than flying without any visual aids in the cockpit. I found a way to improve them though. After a little bit of getting used to, it now works great for me.
The problem I had with the old ones was this:
The tip of the arrow was the only real reference to fly with. It was approximately at your two/ten o'clock position. If the arrow moved towards lead's nose, it could mean "your faster" as well as "your drifting away to the side" and vice versa. I am sure all of you know what I'm talking about
What I wanted was a clear and precise indicator that tells me weather I'm to fast or too slow. I drew a "3/9 o'clock line" onto the canopy (the vertical red line on the screenshots). Although it looks as if it is at an angle, it's truly vertical and represents your 3/9 o'clock position. The interesting thing about this line is, that it moves revative to the leading plane only when there is a speed difference between the aircraft. Drifting to one side does not affect this behavior at all. So it gives you pretty good and "incorruptible" speed/position information. From the screenshots in the reference section I found that your own head should be abeam the tip of the wingtip-rail, slightly low, so simply put the red line there.
The next thing I thought about was the obvious lack of depth perception on a 2D Screen. I wanted an indicator that tells me more about lateral spacing to lead. I therefore drew the horizontal line onto the canopy. The lateral spacing to lead is correct if the tip of this line points exactly at leads nose (provided the vertical line is in the correct position first). If thers's a deviation, simply steer the tip of the horizontal line towards leads nose.
www.alderwasguckstdu.de/Bilder/alright.jpg Correct longitudinal and lateral position.
www.alderwasguckstdu.de/Bilder/too%20close.jpg Too close! Steer tip of red line towards nose.
www.alderwasguckstdu.de/Bilder/too%20far.jpg Too far! Steer tip of red line towards nose.
Another nice feature is that the horizontal line represents your "eye-level", so you see if you are too low or too high in relation to lead. Also, the horizontal line moves up & down when rolling, I find that helpful in judging roll inputs.
I will trim away all unnecessary parts of the lines and make them fade away as much as possible, so that they are barely visible.
OMG this post has become far too long!!!! Sorry, just wanted to make sure not to miss anything important. Let me know what you guys think of this.
Dirty
Make some more 
. The center lift-line will definitely have to be drawn back onto the top of the canopy! It's #1 on my to-do-list!
