Interesting idea to see a pan of liquid over most of the zone 1 area to dampen the heat generated there and to add a little moisture to the area. I will have to give that a try when smoking something big next time. My usual LLH/HHT settings on my 4-1/2 year old PG500 are 30/70 which works for most smokes/grilles. In the winter I sometimes bump those up to 35/75 or 35/80 depending on outside temp. I live in the Pacific Northwest so winter temps are not that cold. If I want high temps for pizza or similar, I will temporarily bump the HHT up to around 100 to really get things roaring in the fire pot.