Y'all had me excited for a minute. My spare kettle lid is just a bit too small for my drum, so I was going to cut the top 3" off the spare kettle and weld that to the drum (the lid would then fit on the lip of the kettle that it was made to fit).
For a minute I was thinking that the kettle bottom might be bigger than the lid and therefore might fit my drum exactly.
But then I realized the mistake in my thinking - the kettle diameter is going to be just a bit SMALLER than the lid diameter, right?
(you can see why I don't build things for a living)