The key component is a PVC pipe coupling. A 90 will work but I used 45 degree ones.
The stuff you need are some wood blocks (mine are fencepost caps, but any plaque will do), one long wood screw, the coupling, and your antlers.
Drill a hole in the center of the PVC pipe coupling, and bevel the hole for a flush fit for the screw head. Install the screw through the pipe.
File down the ends of the antlers so they fit in the pipe. With the screw installed, add glue. It should be something that will fill up a lot of space. I used Gorilla Glue which was kind of messy. Epoxy putty or hot glue should work well.
I have a hot air gun and I heated the PVC coupling to get it soft, then formed it around the antler. Or file it down a little to give it a natural look.
Then I bound the center area with jute twine to cover the PVC. So I have this solid pair of antlers with a screw sticking out the back. Drill a starter hole in the wood block and screw them together.
Add shellac, some picture hangers, and you're done:
These were separate shed antlers, but it looks a little better than what I did with a real deer, which was, saw off the top of the skull, remove all flesh, and mount it. If there's a next time I might just saw off the antlers and use this method (no need to remove any flesh).
If you compare the two in the last photo, the one on the left is real and the right are the sheds. Using the 90 degree couplings might make a more realistic result, but I liked the look of the 45 degree ones. So I have a fantasy animal. But you get the idea.
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!Thanks for a excellent post.