Mark's cut mark on the divergent rail is in the correct place. Rather than fool with mounting short pieces of rail on the turnout I just cut a piece of curve track to the correct length to go from the frog to meet up with the parallel straight track as one piece. I also did his switch 14A configuration with the straight rails. I did not cut the plastic base and glue them together, too much work at the time.
At one of the DuPage shows in the early 90's I came across a guy selling American Flyer compatible Right of Way Industries #4 and #6 turnouts. They were built with wood ties and GarGraves rail and have the closed frog with the movable point like the current FasTrack turnouts. I bought a stack of #4's and used them rather than cut up any more Gilbert turnouts.