The Nuravana Edge Machine has really piqued my interest, but it is insanely overpriced and I'm looking to replicate it. The most critical part seems to be the head attachment. I've found head Chinese-made attachments, but they all seem to be inferior in several ways: 1) the attachment to the wand is too loose, 2) the penis sleeve is too long (that moves the head of the wand away from the frenulum), 3) not made of silicone.

Nuravana sells the attachment on its own, but it's still $99! I know it's the lack of economy of scales that's responsible for the price, but it's literally just a piece of silicone rubber...

What are your thoughts? Is the Nuravana attachment really better?