Twas indeed a 3D printer Jim 
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Interested. Could you share a photo? Describe the process you used?
I think the pic loaded this time. I have zero feedback and no vent, also no more plugged up feeling than usual. Then again, my ear feels kinda plugged up when using no aid, I think since my bone conduction hearing is so bad in that side. I find this works well for me, even though my Audi thinks I’m crazy. Of course she would like me to purchase hers at $200 at set. Got my silicone on ebay for about $12 and I find it very comfortable. I still use a regular closed click dome on the other aid since I dont get feedback in that aid. I have no issues this this homemade mold backing out, it stays in place for me even when eating. I didnt want to insert gooey silicone in my ear without protecting from the goo going to deep, so I decided to install a sealed click dome and put the silicone putty in back if the click dome, then inserted in my ear for about 10 min while taking and until silicone is cured
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Molds can be made with half ear or full ear “locks” that tend to hold them in place.
