Mike, Since you have a CNC lathe, you might consider machining the spigot and where it is connected to the scoop floor give it a nice large and smooth radius, then put a "blocking/turning" vane aft of the inlet spigot to direct the air to turn 90 degrees and go in your spigot. You mite even use two turning vanes, one about half way across the inlet spigot diameter that would only be about 1/2 of the scoop depth and then the final one that goes from the roof of the scoop to the floor with a nice radius. Also make sure that the scoop inlet is above the boundary layer at the inlet to insure full velocity air at the inlet.
Rex