I have two capped nipples and a ball valve. Start my basket minion style with 10 briqs +-1. I let it sit outside the drum for 2-3 minutes, put it in and seal her up. All three open to 190, put on the second cap at 215, and either leave the valve open or close it just a little depending on how hot it is outside. Winter style is one nipple open, valve cracked maybe half way. Settles at 228-234 every time. Like you said, every one is different, sounds like you might not have enough vent going. I used to leave the bung out of the top, since the weber mod I leave the vent wide open. Just remember to give it 15 minutes before you decide how it reacted to your last adjustment, maybe longer.
Weber Imperial Sequoia (restoration in progress)
Weber Platinum (The Green Lantern)
Weber OTS 22.5
UDS (with more to come)
Old Smokey ES (A gift, don't buy one)
Humble member of the Society for the Preservation of Authentic Royal Magical Rare Kaskaskian Peppers
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