This is a good thread Dragon Dude. You know how important I think this is, and you know why I think it’s important. I’d like to be helpful. I’ve made dozens and dozens of these, and it keeps getting a bit easier and a bit more customized. I’m about due for a new set, which for me at this point consists of seven separate sleeves of varying length, circumference, contour, and thickness. 6 of them are made of the thinnest most elastic neoprene I was able to find. One of them, which serves like a ring, is 2 inches long, made of thicker, stiffer neoprene, shaped like a simple wrist band. They all work together to make an elastic cast of as much of your tool as can be.
When I have some good light I’ll take some pics of mine as I rebuild my kit. This always involves cutting open the old ones to trace patterns for the new. This is a good way to proceed as it is easy to make slight modifications that you feel may improve the fit and comfort. Remember that your tool isn’t really tube shaped, especially at your base. I recommend you envision your fully erect base with a shape like the heel of your foot, with the back of the heel, of course, facing down. Where your organ enters your body is equivalent to your ankle. This is where you are headed. My namba builds have been getting more and more shoe like, once they’re all rolled on.
Remember also that none of this will work if you can’t support some amount of erection while rolling on your sleeves. You don’t need a raging bone by any means. Just a little. Each sleeve should add just a little bit more pressure and rigidity. The last ones you roll on should strive to capture more and more base, adding pressure there but not any on most the rest of your shaft. They will also help to provide a slightly more constrictive ring. Not too unlike a cock ring. but much wider. not so defined.
Anyway, I’ll follow this thread, see if I can offer any help. I think trial and error is a good teacher, so just keep it up. You will be glad you did.