This is a moderately complex project with four parts you'll need to 3D print. There are two rods, one blunt-tipped and one flat-tipped, and two halves of the mold.

Print the two halves of the mold with the mold cavity facing upward. Print the two rods vertically with the base down on the bed of the 3D printer. The flat-tipped rod is part of the mold, and has keys to keep it centered in the mold. This makes the hole through the center of the ovipositor.

To pour, clamp the two halves of the mold halves together with C-clamps. Mix, color, and vacuum your silicone, then pour the silicone into the mold. Press the square-tipped rod into the center of the mold and let the silicone cure. When the silicone has cured, open the two halves of the mold, then remove the rod from the center.

Make sure to align the tabs on the base of the rod with the outside edge of the mold to ensure the rod travels down the center of the mold. Press the rod all the way in against the stop built into the end of the mold.

You can use the blunt rod to push alien fluids and eggs up the ovipositor. I personally find tapioca pearls in heavy cream to be suitably horrifying, though of course I'm not a medical doctor so I can't recommend the practice of putting any such material into any part of your body. If you do this, you do so at your own risk.

What You’ll Need

• Shore hardness 20 silicone for the body (I recommend Smooth-On Dragon Skin 20)
• Coloring (I use cosmetic-grade mica powder)

Optional

• 3D Print Smoothing Epoxy
• Mold Release (necessary if you smooth the mold with epoxy)