I am seeing a lot of new folks on here that seem to be struggling with getting the wings set the way that they need to be, so I thought I would put something together that might help.
Here are a few photos of the skinning process. Please note that there are what I call "hard connection points" where the skin meets the body. These points are on the front (shoulder) and back (armpit) of the wing.

After you skin the bird, these points are no longer connected and the wing skin tends to slip away from the body and towards the end of the wing. These must be put back in place during the mounting process. This can be done by grabbing the leading edge of the wing and pulling it towards the body, then pin in place.
The next 2 photos show what pinning will do. Notice the difference in the position of the scaps on the pinned side vs the non-pinned side. Also note the leading edge of the wing on the pinned side vs the non-pinned side. When the skin is positioned properly, you will get a nice crisp leading edge and the scaps will pull in towards the body.


This might not be the way that everyone does things, but I find that it helps me so I thought I would post and hope it helps someone else.
Here is the finished product.

After everything is positioned and I am not going to be moving it any more, I pull the pins and groom the feathers around where they were. It will stay in place if your not moving things around.
Thanks,
Dan