It is hard to tell from the pictures but I am assuming that the wing cutouts will make it difficult to remove the part from the mold. The overlap notch in the front doesn't help any.

I would go with a 3 part mold. Make the left and right as planned but machine a couple index slots where the wing saddle is. Then make another part just for the wing section cutout. Index this into your left and right molds. When you pull your molds apart the wing piece should be able to remain in the part. Then it can be removed.