Hello Guys, I wish to make a very simple garage door which when opened and closed is like in the attached image. In the attached image the black lines are the guides in which the 'rollers' (small red circles in the image) will roll to allow the door to move. Note: The door (straight red line in image) itself will be made of thin iron sheets,thus will be relatively light and the door guides are planned to be ending perpendicular to each other. My question here is, Is this design suitable ? Will it be easy to open and close this door without much effort required to lift it or pull it back down ? Any better suggestions ? P.S. This is a low budget project, thus no motorisation.