Thinking about purchasing a vacumm pump to use with a vacumm bagging/table system to do veneering, clamp work of larger pieces, and also some forming. Looking for enough CFM for a 4'x10' bag. I know you need a little more cfm for forming than if you are doing veneering or flatwork. I also have background in bagging as I did it at my old place of employment. Tell me what you know about sizing a pump for this purpose. Thanks