If we consider 1.3 is 100% then the room for error for an additional 30% airspeed is approx 25% which means 5% safer than coventional factor. Good to know that light and heavier aircraft are carrying more than enough safety during landing.

I've been in practice before landing models in steeper decend by nosing down even with full flaps is very hard to determine the right speed for touchdown.

Applying priciples above for aircraft with full stab such as F-15, 16 & 18 is much easier because at any given angle for elevator is equivalent to the AOA considering airspeed is enough to level the elevator in relation to the airflow. Also at slightly more than 12 deg for hornet on touchdown is very close to tail strike. Very good point by Rob and thanks for the link, I will try that ground effect for short grass takeoff.

Oh I forgot that ground effect is also causing that JetMach to float easily...