Adirondacker, I don't have supersteer, but I have expressed my doubts about its functionality on hillsides. If you are on a hillside which slopes to your left, and at the same time you turn left, your left wheel's axle actually rotates backward and "tucks-in," giving a shorter wheelbase on that side. It also effectively narrows your front end. I don't feel strong enough about this to get into a technical argument, but I don't think supersteer was designed with working on slopes/hills in mind. It will make you turn on a dime on flat ground or in a plowed field, but I think my "pucker response" would go up in the hillside situation. Maybe one day NH will come out with a tractor model where you can turn supersteer On/Off, and that would be ideal.
Since you brought up the idea of steering improvement, I wonder if you remember that on your 8N you had the clutch on the left and two brake pedals on the right side. The ability to use differential braking by locking one rear wheel can make that 8N turn almost like it had supersteer. On the TC33D, your brake pedals are located on the same side as your hydro pedal. It's extremely hard to perform differential braking. On all Class III hydrostatic machines, the brake pedals are on the left and the hydro pedals are on the right. It's a breeze to do differential braking and it will , like the 8N, make your tractor turn on a dime. Also, it is extremely handy to use differential braking to steer the tractor when you are back-dragging with the FEL. When you get your front wheels off the ground or you are on a slope, you can steer your tractor with the rear brakes while you are in motion. I believe this ergonomic feature of the Class IIIs is a strong point in their favor. With 600 feet of gravel driveway, I bet you will have plenty of opportunity to do a fair share of backdragging.
...just some more to think about.
