Haha. I think the inner pipe is pretty tight on the collar now. What do you suggest? I can straighten out the corrugations using a vice grip. The new 45's are barbeque-ing in my old trash gas grill right now to bake the paint a little bit . The stove top meter on them is reading 250-300°F @ surface. Pretty close to what it reads on a high burn. I propped them up on some fireplace tools and set it to medium-low with the lid cracked.