Freud,
Time for the "hydraulics guy" in me to nit pick again. The oil reservoir: I am assuming that there is a baffle (or baffles) down the center of the tank and that the return lines all dump their oil on the back side of the baffle and below the "operating" oil level and that the oil for the inlet to the pressure section of the oil pump is on the other side of the baffle and that any oil that goes to it has to travel over the baffle before it gets to the pump inlet. This movement of the oil will cause the entrapped air, of which there will be lots!, to be drawn off into the vent tank, other wise you are pumping air to the engine and it has no lubrication properties. Also glad to see they put a "clean out" cover on the reservoir, makes it easy to get the misc. engine parts out when one goes "bang!". (Which is also a great reason to run all of the oil from the scavenger sections through a return filter.)
Rex