Hi folks, just trying to understand the advantage to the new "P" vents. I have owned Weber kettles since before God invented dirt, and never had any issues with vent adjustments throughout their design changes. Is this new-fangled "P" vent really that good? Earth shattering? What will it do that I cannot already do? Anyone out there own a kettle with the "P" vents? Seems more of a gimmick to me, but I ask the masses to educate me, prove me wrong. I am looking to buy another kettle... do I need this?