Vertical panel saws are no strangers to the building trades. I've seen one in just about every lumberyard I've been in. In an effort to get these saws onto the building site, Safety Speed Cut has introduced a portable contractor's model. But "portable" is a relative term here. The frame of the model C-4 is 5 feet long (compared to 10 feet on the larger versions) and weighs 148 pounds (compared to 200 to 250). The saw stands 6 1/2 feet tall and is about 30 inches wide, so it will just fit through a conventional doorway. But even though it's big, it's small enough to move in an open pick-up truck to the site for