When the “grass launchpad” is inserted in the large rubbe base, are your feet and the ball at the same height? Is the base about 2″ high too?

When the launchpad is in place, the ball sits on the turf approximately 1 inch above the base. This added height will allow your club head to go down and through the turf without bottoming out. Some of the height difference can be countered by some elevation in the soles of your shoes.