Loose knots are acceptable unless you can push them out. Knots on fingers and rabbet ears are acceptable. Knots in hand holds are acceptable ½ the thickness or more can be missing from the top or bottom of the board as long as it remains a functional board. Sides and ends with hand holes slightly off center are acceptable.
Use with the 6 5/8" (16.83 cm) Unassembled Medium Super (Illinois) 8 Frame use 6 1/4" (15.88 cm) Frames and 5 5/8" (14.29 cm) Foundation.