Got a problem with interpretation of the plans.

On the trailing edge of the wing frames it instructs to trim the sheeting so that it is 1/2" longer than the ribs, which I have done.

The instructions then show a diagram of how the TE should be sanded (photo 2)

But to sand it this way there is much less than 1/2" of sheeting. If I sand the sheeting back like this won't it affect how the plane fits in the wing saddle?

Also the wing TE ribs do not taper to a feather edge as indicated so this would require changing the shape of the ribs which would make it even shorter.

Don't quite know how to proceed. Any suggestions?