Re: How much water in your vase?
In my QT I fill to about half the vase, which gives me about .5 to .75 inches of downtube into the water. The pull is amazing. In my Black Rock it's hard to measure as the vase is not transparent. But, I aim for about the same amount of downtube in the water as with my QT. Smoke happy.
Al Fakher Large Solid and a bowl of DM . . . life is good!