I covered the wings on my own Hog Bipe not too long ago. I don't have photos of each step, but I used the following approach and seemed to work quite well:

1) I cut a rectangular hole out of some scrap monokote that was 1/8" wide, by the length of the mount, then I trimmed it to be just slightly larger than the width of the cap strip under the mount and ironed this down with a trim iron. I made this as tight a fit as I could against the mount. This allows me a little wiggle when stretching and shrinking the main covering piece while still having a very tight clean fit around the mount.

2) I cut a large piece of monokote for the wing half.

3) I made a mark just past the center of the wing (to allow for overlap of monokote on each half) and measure from there to the mount. Then I cut the same size rectangle as above in the large piece using the measurement just taken.

4) I positioned the monokote over the mount (poking through the rectangle cut out above) and lightly tacked it in place. I then continued to tack, stretch, and shrink as usual.

5) repeat for the other half