The Perfect Cock-Ring ?!

I tried some cockrings, self made and bought, and never was much satisfied.
The biggest problem being them not staying at the base even if they are very elastic and tight.

I’m now trying to find a shape that is worth to produce and use.
Inspired by discussions on TP, I think that it has to be contoured, mimicking the pelvic bone shape.

From our POV the topside base has less dick exposed so to say. The underside(CS) has much more “flesh” for the CR to position behind.
Having the constriction tight at the topside base is rather easy. On the downside not so much, as the balls and sack can be in the way.

So this a brainstorm with the aim to get a good CR shape.
Attached a side view of a prototype I contoured from my junk.(obviously too thick overall but it’s about the shape) And an anatomical pic.

Ideas?

Something related that I’ve thought about for a while is a better shaped clamp as well, I imagine there are similar anatomical issues.

Look forward to seeing some ideas.

Which would be very hard to create if it was cable clamp style one with hard plastic and hinges etc.

I’m thinking about a new air clamp version though where the air chambers fill similar to the above contour.

I have some silicone on stock and might try something if I manage to get a prototype idea.

If you wanted to use the original air clamp you could just take a section of pvc pipe large enough to fit over it and heat and bend it to any shape you want.
It’d inflate and conform to the shape of the pipe.

I don’t own an air clamp, the PVC idea is good though cause expansion of any bladder needs to be stopped in some directions and I’m debating on how to achieve that.

I have always disliked all day cock rings because I feel like 1) they interfere with my urethra and corpus spongiosum, which can be uncomfortable, and 2) after a while they serve to keep blood out of my penis as much as they serve to keep it in. If I were to design one that I thought would function better for extended use it would look like a metal ring that wrapped around the base of the penis with a gap where the corpus spongiosum and urethra would sit, with two beads/balls that sat on either side of the corpus spongiosum. Somewhat like this picture, but shaped and sized to the contours of the penis.