I have a crossover on a module I am building with Atlas code 55 #10 turnouts. My goal was to have these controlled by one fascia knob. I had to drill a small hole in the Bullfrog closest to the fascia knob to facilitate a clevis that would activate the other Bullfrog. I was worried about the tight curve in the control rod and guide but it all works great. Because this was all mounted on foam I first mounted the Bullfrogs on thin plywood for added support and to take some of the side to side shock from pushing and pulling the fascia knob. I used Liquid nails and 1-1/2 " #8 screws to secure the plywood to the foam. One of the Bullfrogs is mounted on 2" foam and the other has the throwbar wire running through 4" and both work fine. I did have to replace the supplied wire with a longer .39 wire for the 4" of travel.
My take away from this is to get a double Z bend as supplied in the modular double sided controller kit or a double clevis.