Yep, page 54 “The four windings on T1 must all be in the same “sense”. There are two ways to wind toroids. You might call them left-handed and right-handed; clockwise and counter-clockwise; whether the wire goes through the toroid from top to bottom, or from bottom to top. Whatever you call it, all the four windings have to be the same, to be sure to get the phasing to the quadrature sampling detector correct.” In my photo I had very carefully installed the windings with the three small ones one way but incorrectly with the large one the opposite and had to redo it .