While co-oping at NASA DFRC I learned about the Horten brothers and specifically the improved handeling qualities of thier pure flying wing designs. They accomplished this with a combination of high aspect ratio, high taper ratio, and a non-linear wing twist. Xc would not have adverse yaw, and in fact would have proverse yaw at most lift coefficients. Since the Klingberg Wing has similar taper and aspect ratio, I decided to build my Klingberg with the same wing twist as the Horten Xc.
Video shows that it has no adverse yaw.
Here is what the jig looks like This jig determines the twist of the wing. It also causes the leading edge to bend down at the tip. This gives a negative dihedral effect. To correct for this I included a dihedral angle at the joint of the two wing halves of 4.5degrees. I also changed the size and shape of the elevons so that the change in lift that they produce would have the most positive effect on yaw.