I'm wondering what is the proper set-up for the 52" Gateway as far as height? I want to cut between 3-3.5"(Fescue). The rear wheels are in the middle position. It certainly appears that the rear is more than 1/4" higher than the front with the front casters lowered all the way. Should I lower the rear wheels one notch (1/2")? I won't be using if at any other heights enough to have to worry about adjusting it anymore. The manual is pretty vague as to which settings to use for this.