I know some people have fully tested this design out by now.Is it handleing the odor? I just bought all the materials to make this.I have one question though.I am making it like bongasourus did with the pencil holders.Do I put the carbon in the inside of the smaller one like on sugabears design? Or do I leave it empty? I noticed that the last pick on bongasourus didn't have carbon in the inside pencil holder.