https://a.co/d/7x6vICB
silicone glue - used to paint the vent holes and make them imperceptible, to paint the retrieval line knot, to paint the tube before folding the ends, to make sure the o-rings don’t move
https://a.co/d/3owmQsX
larger o-rings that act as anchors
https://a.co/d/iQOMYPI
smaller o-ring that will be the end of the retrieval line
Not seen, a plastic tube in the distal end to keep the fold open, I sealed this with silicone glue as well.
18cm retrieval line that can sit just outside the lips of the penis or pushed into the meatus for stealth and comfort.
Spargano, I look forward to seeing a picture of your new design, it sounds interesting. But I can't get my head around how the o-rings are attached and where they sit, and how they interact with the holes in the silicon tube.