Originally Posted by Bludawg
No guarantees but it has worked for me a few times. Put the lid on the drum and secure it with the ring, and heat it with the weed torch when you get it screamin hot use a ball peen hammer and hit the ring all the way around then put a sopping wet towel in the middle and just leave it to cool all the way down. It will draw the metal to the center leaving the ring on until it cools will allow it to form to the top of the drum.
I'll give that a shot I appreciate the advice. Worse case I'll buy another barrel or better yet get the weber domed lid!