Reply to "Opening Doors on a Roundhouse"

You can do it without motors or push buttons, Hook up the doors to a string, a spring and some straight wire. The spring pulls the door open a bent wire on the ceiling gets pushed to the back of engine house closing the doors behind you. when you back out the spring pulls the door open. I saw this on a G gage engine shed. I think Delton trains or Kalamazoo trains.