It is finally time to retire my old Char-Griller Smoker due to rust. I am planning on buying another Char-griller or a Brinkman offset. I know that tuning plates and a baffle are common modification ( I did not use them in my last smoker) and I would like to know what exactly I can use that will be effective? I am not a welder or handy in anyway. Can I get some sheet metal or stainless steel from big box retailers? Thank you for any help.