It was for a friend, I doubt I could get any more vapor into myself with 2 rather than 1, the Tera will milk as hard as you can pull. If the vapor is whispy...pull harder, I have not managed to out pull the heater, even with help.Better clouds with that double hit....
The densest vapor I can get is after the first 5 minutes on the bong, open up and use your S&B brush to grind the abv while in the Tera like a mortar and pestle. Restart on flat out and hold on for one or two huge rips!
I have also found pushing the 12/16mm top hat into an 11mm or 7/16 socket also does the same job as pinching the filter to make it stay on the WPA a bit tighter.
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