Piccup Sail Data Pinit SKU: X-SD-8551 Quantity discounts available QuantityPrice Quantity -+ Add to Cart DetailsDetailshttp://www.duckworksbbs.com/plans/jim/piccup_squared/index.htm designed by Jim Michalak balanced lug: foot - 8'9" luff - 3.10" head - 9' leech - 10'2" I have no idea what variables I, J, P, & E represent.