Having lost my father to a TIA,I have both sympathy and admiration for anybody that recovers and tries to resume a rewarding activity.I don't know if the program dxf2cnc might help,but it is a free download and might be worth a try.I don't know anything about plasma setups but I suppose it can't be so different to any other process that involves joining CAD entities together and telling the system which side of the line to cut.Best of luck!