JEREMIAH - Nope, The RULES are you have to have at least ONE GD if you have three or more tractors. Ideally you need one of each if you only have two, but the founding fathers decided to give people that didn't understand the desire/need owners would have for the constant high drawbar loads and consistent speeds a break since plow day's hadn't been created yet when the forum was born.
I'll admit the hydro's are nice for slow variable speed jobs, rototilling, blowing snow, and are O-K when mowing grass of varying heights & densities, but everyone will have to admit they stink at holding steady speeds for things like spraying, and nothing pulls a heavy load as nice as a GD. My aerator pulls as hard as a 10 inch Brinly plow and I always use my Gear Drive 72 on it. I used the 982 for two years but prefer the 72 even with the manual arm-strong lift. Plus I tried running my sprayer ONE TIME with the 129 when spraying around all my trees & bushes, and it was a real pain, always short at least one hand to control something and you sat there with nothing for your feet to do once you pushed in the foot/brake pedal to return the speed control to neutral and needed to move again. I stopped before I was even done spraying and went back to the 72 to finish. I didn't have the 70 back then. I even use my GD's for powering both my blades, the last 4-5 yrs the 70 has been the dedicated blade tractor, belly blade for grading dirt in summer, frt blade for snow in winter.
So you better go find a gear drive to put to work.