What kind of idiot does this... π¬π³ I've been trying to get this right for too long... Same issues as everyone else, either too small or not enough of a size difference between the lip or rim that goes right inside and the tunnel bit. Or just too big for comfort over any length of time. But I think I may have found a couple of options now that might work.
https://a.aliexpress.com/_mr1zJ3q
And
https://a.aliexpress.com/_mrteyFK
Has anyone else had any luck with either of those? I have one of each. I just got the first one but I think maybe I should have gotten a bigger one. We will see, it's certainly going to get a lot more testing π. And I need a smaller one of the second, I really can't get it in.