I am wanting to know what to expect as far as productivity goes across between the avg 21 and avg 36 wb on 1/6 acre to 1 acre. Of course it will benifit more on the 1 acre than the 1/6 ( cause of more turn arounds per area). However, on avg, what is the diff? Is the avg 36 about twice as fast? Do the Hydro's go at great speeds and ease than belt driven?