By following these Added Step Plans, one can produce a device to help reduce strain on knees when climbing on or off the tractor, combine, or other equipment. The step flips up and down with a rope and stays in place while driving. (Those who don't need the extra step can simply leave it folded up, stepping on it in place.) The online instructions include a list of supplies needed as well as the text and pictures on how to make and mount the step. The author indicates that in an equipped farm shop it takes him about two hours to build this step.