I have started installing the prop and have finished the back plate and doubler. I have removed the locking nut on the four bolts to fit on the plate. There is a 1/4x3/8 spacer and three washers per bolt. The drawings are not clear on the order of placing the plate/doubler on the prop. Is the order:spacer, three washers, plate w/doubler then locking nut? My instructions say use temp non locking nuts first and then use the locking for final installation. Did you use one, two or three washers per nut? This would change the depth of the plate relative to the blades.