Tony, you have it just right. However, it is more than seeding. As I understand it, cross pollination if the grasses flower may lead to hybrid weeds. While I agree with RJ's sentiment, as one who has been involved with the Chicago District's efforts to test new grasses, I know that the search for "perfect conditions continues unabated. I am afraid that most of the improved conditioning has gone hand in hand with less "interesting" architecture as the beteer grasses have required more irrigation and grooming which increases the costs of maintenance and leads to narrowing of fairways etc. The attempts to breed grasses that need less water may be a step in the opposite direction.