You could be correct in being concerned over the P5 not handling anything lesser than 072, although G motors seem even less tolerant and expose my poor track laying skills every time.
My catenary install has been delayed somewhat as I rework said track laying and build/ integrate a train shed much like the design at Harrisburg. This is a change from the initial idea of an open platform style station like at Lancaster. Truth be told, lately, I fire up the ZW's and put in more running than building time. Other house reno's on the go sort of dampen the layout construction ambition too.
Powering the Cat wasn't in the plans but there is always that possibility. Getting the wires even enough for the pantographs to follow them smoothly is first priority here. Because of the layout size and multiple elevations, the Cat serves as an excellent TMCC signal ground plain when hooked up to household ground.....a real noticeable degradation where no overhead wires exist. Fortunately, the Cat already installed has proved resilient enough to withstand my clumsy moves. Just need to get back to the bench and solder up more sections of it to continue.
Off topic a bit... A recent video stunt showed a young man dangerously riding outside on the rear of a Toronto subway. As a comparison, the news ran another video showing some dope surfing the top of a motor, hanging on to the Faively pantograph!