Originally Posted by Unfathomable Bastid
I have both a flat barrel lid and a weber kettle lid. I plan on drilling the hole for the thermometer in the flat lid (my weber kettle lid already has one). Unfortunately, my kettle lid doesn't fit the barrel tightly. It kinda balances on top of the rim, actually, even though the seal seems to be fairly good.
My lid, not a weber, balanced on the rim too. My fix was to put 4 nuts and bolts angled inward in the lid so it wouldn't slip off. I also added stove gasket to complete the seal. You can see the bolts here:
gasket was added later.
Just a thought.............