I think some of you are missing the point here. Yes you can use a piece of the whip or even the 10mm thought with the actual tip meant for Herbie was a great idea. But, you still leaving something in the airpath to void some of the flavor. It would be the same thing as putting a whip on an EVO. Sounds pretty silly.
Unfortunately I'm not a 3-D artist but my suggestion is very simple.
Your bowl is made up of a bottom half and top half. Imagine the top half was made out of ceramic and only ceramic. Looking at it from the bottom and you would see pin holes (air exhaust) and from the top - a ceramic gong or Cong. IMO I would do a bottom piece like that as well but the air intake may have to be to spec for the heat to travel into the bowl.
I don't know, I'm not a fucking scientist. But what I am is friends with tons of people here. And all my friends that DON'T have Herbie tell me it's purely because of the whip.
Josh, Sheila, and Bob - similar to field of dreams, if you build they will come.