That makes sense for sure. Creating more volume is what I was attempting to do with the funnel. With the tube going into the funnel I capped it off and then drilled holes on the sides so that the air will be pushed to the walls of the funnel. The attempt is to create even air flow going to the bottom of the drum. I plan to drill more holes on the bottom plate. I haven't lit it up yet, but I have hooked up air to it and air comes out pretty good. I also have nothing to compare it to either. I don't personally know a single person who does anything like this. All I can really do is try it out, see what isn't working, figure/find out what to do to fix it, and try again. Improvise, overcome, and adapt as I've been taught.