This question I'm really aiming at is for those of you who have used both mowers. How much faster on the average 1/4 acre or less lawn? I'm not talking perfectly landscaped lawns either. Grass up against the edges of fences trees etc. Average working class lawn with minimal landscaping and borders. Throw in some fairly fragile borders and edging that are common in retirement communities that would be destroyed by rough maneuvers. Does the dually really save much time over the single? FYI: I have a Q36 Samurai with the step saver and the sulky stays stowed and folded up roughly half of the time. I really like to have it there and I can pull the pin one handed and use the knee maneuver to drop it down. Same to fold it back up just takes a few more seconds. What concerns me about the dually step saver is it doesn't fold up? How big of a pain is this for those of you who have it- to run back to the trailer to get the sulky? Will the single sulky work on the dually?