Ive noticed differences between F22 sketches and the M4 drawing. S hould I be concerned?

When building F22, the sketches (chapter 4 page 2) and the foam layout (chapter 2 page 5) suggest a foam extension to be installed in the outer and center web. The full size M4 drawing does not show these extensions. Trace the full size M4 drawing as shown. The overall height dimension when assembled is 21.25 inches. 4.22 - I have noticed the NG-30 assembly from chapter 13 is wider than the vertical web on my F22 bulkhead. The vertical web on the F-22 bulkhead is 3.5" wide. The NG-30 assembly is 3.8" wide. Making the vertical web .3" wider will allow a nicer fit, and the extra width can be trimmed off later if not needed in chapter 13.  more