I have a question on scalping bermuda and zoysia. I have always done my beginning of the season scalping with either a walker, and the past 2 years a navigator. I am thinking about getting rid of my navigator and just running walkbehinds. I am curious if anyone out there does their scalping with walkbehinds and can give me an idea of how much time it takes with a 48" or 36" wb (time based on sqft.). I know it will take a lot longer due to having to dump more with a wb. I am trying to find out before I make a mistake in getting rid of my navigator.