In the picture, the arrows indicate oil drain back from the center iron (rotor cooling oil and rotor bearing spill) and on the ends from Main bearing spill.
The thin line above the pickup indicates the position of the stock pickup.
Lay a straight edge across the picture to represent an oil level for climb and decent attitudes.
Note that in a steep climb the oil supply could move into the cavity of the front cover.
As in the race car a baffle is added, but in aircraft the baffle could be the engine mounting plate. The only opening in the plate would be a 7" by 7" hole in the center located below the center iron drain-back hole.
The pickup cannot be uncovered in anything but inverted and knife edge flight. The extra little sump could be round or square. The pan could be tapered on the sides as well. A drain and magnet in the sump bottom of course.
For your viewing pleasure.
Lynn E. Hanover