Been doing some reading lately on Bi-Plane Streamers and they sound interesting. Has anyone here been tying them and using them? How productive are they? Are they any better with the wing tied flat?

I did tie up one so far that is called the Black Ghost Bi-Plane. There is one white hackle tied at the bottom and 3 tied flat across the top. Tied this way is suppose to make them more 3-D much like some flies tied "in the round".

I hope that Hans jumps in here and lets me know where I need to improve on the tying or maybe tie one up with a SBS so that I can see where I am making mistakes.

Well, here is what I tied: