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.

man

Ah .... I missed the "velcro" tabs part.    Not a huge fan, though some do work better than others.  

I'll give it you straight....   a STR8UP. 

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.