I've always been intrigued by the Dunhill Cavalier (and Il Ceppo's copy). I figure that even if it's a gimmick, it's still a Dunhill and would work reasonably well. Is the whole contraption besides the bowl and metal bowl attachment Ebonite? Or are the parts south of the stem some other material, like aluminium? Are those o-rings on the top and bottom of the vertical tube? If you have one, how does it smoke?