RE: The Answer to Jeff B's arrow problems
The unstable aerodynamics on the curvatures of the "ball" would most likely cause inconsistent lift, nose- diving, and right or left veering. Not to mention how much it would slow an arrow.
The best innovation I have seen in an attempt to eliminate planing, which was a long time ago, was a paper-material cone that slipped over the head. The idea was that the material was tough but thin enough that the broadhead would punch through the cone upon impact and the cone was aerodynamically stable. I guess the invention never caught on.