He frequently posts high-resolution pictures, drawings, and illustrations, most but not all of McAir aircraft. I look at it about once a week and frequently see something that is new to me. In this case, it was a repost of an XF2H-1 drawing that I hadn't taken a close look at the first time: http://aviationarchives.blogspot.com/2015/07/xf2h-1-aerodynamic-three-view.html
There were three XF2H-1 (né XF2D-1) prototypes. This is the first one, BuNo 99858:
Several changes were required to solve aerodynamic problems. (see http://tailspintopics.blogspot.com/2009/12/f2h-banshee-modeling-notes.html). This is the second prototype after wing, nacelle, and empennage changes and the addition of the tip tanks similar to the ones that would be incorporated on the production F2H-2:
The production F2H-1 design was also lengthened a foot forward of the engine intakes to increase the amount of internal fuel. As it turns out the XF2H-1 drawing shows that the third prototype, BuNo 99860, incorporated this change. I hadn't noticed that until now because it retained the distinctive short XF2H canopy.