I had piece of 6" X 2" aluminum rod stock and I was bored so I got to work with my drill press... After all the machining and drilling I blew it clean and step-sanded then polished the hell out of it...
The end result: A MECHANIC'S SPECIAL!
A polished aluminum (chrome) piece.
This piece hits cleaner and better and lasts longer than any piece I have ever used. The step drilled bowl (almost thredded) keeps it nice and packed and burns slower (less waste) as well as creates a vortex which believe it or not calls for a more direct hit. There is no shotgun but you really do not need one with this piece
