I just purchased a Hustler Z 25/60 xr-7. It really did great my first day of mowing. My only question is that the anti-scalp rollers are set at the highest setting and I cut most of my yards from 3-4 inches. I scalped a few times on places that I did not think I would. Where would be my best setting? Top, Mid, or Lowest? I only have one account that wants it cut at about 2 1/2 inches.