Once the cuts were made, I duct taped the Piggyback Inclines into the base. I also duct taped the base box to the table and the bottom incline box to the end of the table. That means I secured the apparatus at three points forming a triangle if I were to connect the dots. There is that pesky math again. Math or not, it did create a lot of stability for the whole structure.
To understand how the corn poured into the top incline empties through the bottom incline, let's go back to the initial decision to put one box on top of the other.
A hole already existed in the bottom of the top box. I cut a flap in the bottom box to create a slit for the corn to drop into from the top box.
A cardboard piece is taped over the hole so corn does not spill out and is further directed into the bottom incline box. This closeup shows the patch outlined in yellow. Of course, there is one on each side.