Kinder,
I'll take a stab at this since no one else has. There are two things to know to make a successful flying wing and the first is the only real requirement:

1. The CG should be at 10-12% or so of the chord length instead of the 25-33% that is normal for an airplane with a tail.

2. Flying wings like an airfoil that has a little "reflex" in it. This however is not an absolute requirement as I have made flat-bottomed SPAD flying wings that have worked fine. I just had to reflex the elevons up a little to provide the needed "up".

Build a Sickle and fly it, you won't be disappointed. The CG is really the critical thing. You can move it back from the 10-12% once you have flight tested the plane.

On the first flying wing I designed and built I had pretty much the same information presented here and was able to successfully build on that worked. I essentially took the Sickle design and put the wing on the top of the PVC fuselage instead of the bottom.

Good luck,
Adam