I have a feeling the Arctic lid is going to be too small on my drum, unless it's bigger than a Weber. I already have a 'Plan B'; I'm going to add a strip of SS that is 1/8 X 1-1/4" around the inside of my bead. I'll attach it with screws and caulk w/ hi-temp silicone if necessary. Although it is tricky to balance, my drum runs perfect with the Weber lid; I hope the Arctic works as well.
I'm very intelligent, but I mask it by doing stupid stuff.