Hi…I am in the middle of building the 45 degree angle bar and have a question regarding the OAK beer gutter lumber (#s 81, 82, 83). The parts list MATERIAL column shows these as 1″x6″x8′ Oak Board stock. However the widths are 8″, 7.5″, 7.5″ respectively. Should these actually be 1″x8″x8′ boards?