The crux of MacCready Theory is choosing the right MC Value (MC). The theory then combines the MC Value with your glide polar and with the horizontal and vertical airmass movement. It then calculates the perfect Speed To Fly (STF). This maximizes your average cross country speed.
In flight, the glider pilot must thus simply choose the correct MC Value, and the flight computer provides the correct flight speed. This reduces the workload in the cockpit dramatically.
This paper takes one step back and introduces a correction to the common theory of the theoretical correct MC Value, more specifically pertaining to the unavoidable time loss by centering a climb.