This is a big bowl. The centre hole is large. This allows for very open draw. I needed a big grommet to fit it on my KM and German pipes. I also put a few less holes in the foil to tighten the draw a little. I prefer it that way. Smoked AF Fumari Azure and Nak. Nak was not as good as the others. Maybe because it's a bit dryer, not sure. I used Reynolds HD and Soex foils, both, no problems. Anyway, I rate this as one of my best bowls and if you buy one I doubt you would be disappointed.
I like this charcoal. Burns a little longer than the finger coals I use usually and less ash. Burn a bit hotter as well. But I will still use the finger charcoal as well. I think they are better than that popular brand that starts with T and are at least half the price.