Prior to the Katy's abandonment of its Holden branch in Paola was this switch a part of Frisco's PB tower interlocking? I assume in the time frame of the late 40s and early 50s that this would have been an "armstrong" interlock-true or not? The reason I ask is if I'm going to the trouble to build this interchange, with all the cranks and rods, I'll want to be reasonably accurate and include all the lines and branches involved. Thank you. Larry F.