Thats genius idk why this isnt widely used? Wait are you talking about the iron? Or the attachment that turns it into a vape for bongs/ vapor bonging?
The attachment isn't airtight and vapes very poorly in my experience. It doesn't seal against the bowl.
I saw some guy post pics of before and after when vaping with teh HI. Looks like it worked pretty well, just don't know how much hassle it was compared to a regular vape