I am looking to get a firebox to attach to my char-griller pro I have the model that doesn't come with it. Has anyone ever did a mod to one of there? I called the customer support for CG and they said it can be done with some modification but there is no specific direct fir model. Or does anyone have a better Idea to help out cause every time I have to add wood or lump I have to open the lid and lose heat and longer cook times. Thanks and Smoke on.