I don't install the capacitor in series like Mike show in the video ; since I run a bus under each rails ( #12 gauge wire) and the detection rails as also a bus wire and each pieces of fastback as a feeder connected to the bus, I simply connect 1 capacitor between each bus of the detection and the outside rail , of course each bus of detection are separated, but the outside rail is continuous all around the layout . The power block finish at the same place as my detection block, I plan to use 4 TIU as my layout will grow, so I will have 16 signal blocks . You can see the capacitor in green. On the pic I show 3 blocks.
It work well
