Update! One car ... Half car ... Cut. Here you see the conductor radioing to the engineer in front of the new stop bumpers And yes they do stop a train car with speed.  And do fold up if hit full speed.  Of course your car will derail. The layout changed slightly I couldn't get three cars in the one siding so I had to reconfigure. Final detail parts are still trickling in but the cars are complete aside from the two tankers In the video I dont have the air connected as I have to route lines And I left the part where I try to run through the decoupler