We should all be dang glad we can get anything to start with. What I've began to understand over my 50+ years of replacing rotten Tin is the real problem seems to be your Skill Level and what you consider Done Right. If "YOU" are a skilled metal man you take what you can get and get on with the job at hand. Starting with EMS panels and doing the job is much easier than starting with a sheet of Tin, an English Wheel and a Sand Bag with an assortment of Hammers. I have done both and will say "Bring me that EMS panel" then turn it into what we need and get this job done.