Im going to grab a small Walker 18 hp 42" deck for gated yards. My dealer has in the showroom a model with 2 smaller wheels in the back as opposed to the one usual larger. The brochure and internet show the same mower with the 1 larger in the back. Which is preferable?? I feel the larger wont leave turn around divots as easily, is this true?? Thats what I want--no divots!