[Tricky]

I've finally located a Weber kettle lid (thanks Craigslist) and of course my drum top is too big. I'm going with a method that some on the forum have recommended -- I have a 6' piece of 1/8" x 2" flat bar steel and I'm going to attach it as a ring inside the top of my drum to reduce the circumference to the size of the Weber lid.

Once I find my special calculator that has a "pi" key ;) I'll cut the steel to the appropriate length. But for those of you who work with metal a lot, what's the best way to persuade the bar steel into place? Do you think I'll be able to just bend 1/8" steel by hand into a ring shape? If I pre-drill some holes in the steel, then drill some holes in the drum as I go, bolting the steel bar into place one by one, do you think I'll be able to just persuade the steel into place with a little elbow grease? Or am I nuts to think that I can do this by myself?