Great pics of the outside parts of the step, but it's not the outside you should be concerned with. The "doughnut" holding the inner base of the step to the bottom of the hull can dry rot over time, become loose and fall off. This is where the problem begins. I've seen folks sailing along in their boat thinking all is well in the world when SNAP! Down comes the whole rig with a big chunk of deck attached to the bottom of the mast. The deck placed inspection port is ment solely for mast step repair/maintenance not for a gear bag. If you want to put some glass around the base of your mast you'll have to put a port up there. If you want to take your chances that's fine too. It's your boat.