Fin Alignment question for herb

I have your dimensions for the placement of my ofishl original boxes and fins but im having trouble interpreting them. here are the dimensions you gave me. standard setings are 11" x 3-1/2" x 1-1/4" off the rail from the trailing edge., I say go 12" x 4" x 1-1/8" toe just past the nose,and give it 4% of camber(cant).Herb. this is my first board ive made so i need a little extra help. 12" from what? by 3-1/2" by 1-1/4" what are the references from? thanx for your help

standard setings are>>> 11" x 3-1/2" x 1-1/4" off the rail from the trailing edge., > I say>>> go 12" x 4" x 1-1/8" toe just past the nose,and give it 4% > of>>> camber(cant).Herb.>>> this is my first board ive made so i need a little extra help. 12" > from what? by 3-1/2" by 1-1/4" what are the references from? > thanx for your help …the 12" is for the side fins = 12" from the tip of the tail to the back of the fins.the 4" is for the rear center = 4" from the tip of the tail to the back of the fin.the 1-1/4" is how far the back of the side fins are from the rail.Herb.

12 inches up from the tail. Fins are measured a distance up from the tail. Usually between 11 and 12 inches.