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This is more of a question of slits or no slits. I am ok with the 4 hole design but was more concerned with high efficacy vs non high efficiency.

Anybody have input on this?

I just picked up a new Arizer Solo and a water tube. I now need a gong but not sure that I need one that is high efficiency with slits at the tip or one with no slits? The new 2014 Solos are supposed to have better airflow is why I ask... Thanks.