Hi All, Excuse me, but that seems like a ridiculously complex way to cut the hinges into a door frame. this is the method I use, and which is always used by all the pro joiners I have ever seen fit a door,
Fold hinge to 90 deg and place on edge of door, pencil round and mark thickness of hinge on face of door, Chisel out and fit hinge to door, repeat for number of hinges till all are cut. Offer door up to frame, pack up with hardboard/cardboard to obtain correct clearance at top of door, mark hinges on to door frame, mark thickness of hinge on frame and chisel out.
Fit Door.
Twenty minutes tops and I am an Electrical engineer, A real joiner does it in less than half that time
Phil