Q On Doing A Grooming Deer.

I don't know of a video offhand that shows the process on that particular mount. I would probably cut it off at the bend in the neck and mount the head and top half of the neck first, making sure I had the cape taxied to the correct position (hair patterns). I would also cut it in a V shape to allow it to reposition easier. As far as a video, I don't know of one, but there may be one out there, you would just have to search through all of the supply catalogs on line. There's a ton of resource videos out there.
One thing I would note is that some of the grooming deer I have seen have the head and neck bent more than I think they can actually bend in reality. If it were me, I think I would alter something like the McKenzie 8900 wall pedestal. But that's just me...

 

I did one years ago and I used the form VanDykes offered. Fosters had one or two as well. It actually was the size I needed. I did remove the head and used the half jaw set, removed bottom jaw of form and installed jaw set. I them made it into a cast lip set up with apoxie sculpt, I also removed the nose and carved out my nostrils and did all of my apoxie work and paint work in the nose and jaw set and reattached to the form. Once dry the finish work was minimal, a small strip of apoxie and blend and then blend paint. I think if you only use a small y cut, it may be harder to get the cape on, on that cape it was cut all the way down the back. Make sure you have carved out enough foam where the neck skin has to tuck under the jaw on the inside of the turn. If you get what I'm meaning.

 

You are welcome. Yes, it is for the extra skin on the inside of the turn. It is hard to explain just how much of a slot to cut. I don't know your experience with life size animals but I'd say treat it like the legs of a life size bear standing on all four legs, often times a pretty big slot is needed to tuck that skin. Test fitting will help to tell you how big of a slot.