Inter seeding greens / red nine update

We are inter seeding greens today with a newer variety of bentgrass. The newer bentgrasses have better growth habits and stress tolerance than the older ones. Inter seeding is a practice we were once really aggressive with, but stopped when university research claimed it was a waste of time. Fast forward a few years and this turf doctor disagrees with University PhD, my eyes and experience tell a different story. I now wish I had kept up the inter seeding practice.
The red nine will open as the turf begins to grow. We need the turf in the trees to be able to handle the cart traffic. The photos show how thin the turf is in these areas.
Won't be long,
Turf