Sounds like a planTake a look at how the wire clamp holds the cap on and determine which way you'd need to gently bend it so it applies more down force. (I made the 'V' part of the wire clamp a bit more narrow.) Then remove the wire clamp and lid. Clean the top surfaces of the MC and gasket of any debris. Put the wire clamp in the vise so that you can bend it. It doesn't take much. When you reinstall the gasket and lid, you'll notice its pretty hard to snap the wire clamp over the lid. If its too tight then you bent too much.