That's Rich. He's watching the mill run, always at the ready to adjust or tweak with whatever needs it in order to respect the character of the oil.
To the left of the picture and behind me, there are two machines, both centrifuges. The first centrifuge is specifically made to separate olive oil from its mash, expelling the great quantity of waste product behind it and back outside. The second centrifuge is a more refined one, to decant more perfectly the final olive oil from its spigot.
