On Wednesday, July 25, 2012 12:18:02 AM UTC-4, Eric Greenwell wrote:

It's my understanding that head-on collisions are very small part of the
mid-air collisions;

If you aggregate all pilots and all collisions, that's true.

As a rule, I avoid gaggles and crowded landing patterns. But I share the short local ridge and the cloud streets near the airport and I've had several head-on fly-bys.

Universal PowerFlarm is a much better solution.