So why would you ever want rigid axle?
Don't really know.
Now, I finally have some time to give my opinion of operating this zero turn.
It starts very easily but has glow plugs for chilly days. The lift for the deck is hydraulic. It seems very harsh operating. There are 2 foot pedals up and down. When you raise or lower it, it is very quick and seems to slam down or up. The deck is adjusted with a twist control on the right side. It adjusts from 1"-5" in 1/4" increments. I had Gator Blades installed and they worked very well. Except for one issue. It seems that some Gators may be a tad longer than the OEM blades. That was what I ran into. The blades occasionally either hit each other or hit the baffles. The dealer didn't get a chance to try it out after they put the blades on. Nothing a little 4" grinder didn't take care of. I have no idea how the OEM blades work, they are still laying in the floor of the truck. The deck is very stout. It is a 6 1/2" deep fabricated deck versus a stamped deck. The blades are spinning at 18,100 FPM. The deck is shaft powered.
The speed control levers are easy to operate for this ZTR newbie. Yes I did put a few divots in the yard. You'll notice I said yard and not lawn, so it didn't matter too much to me. It got easier to control with just a few minutes of operation. The seat is pretty comfy. It has a suspension adjustment on it and made a lot of difference when I turned it to a softer ride. The arm rests adjust somewhat, titling up or down. It has a lumbar adjustment on it as well. The seat back tilts too, I think. Oh Yeah..............it has a cup holder too!!! My insulated coffee mug fit in very well.
Now on to the cutting. It had rained here for 2 days before I tried to mow. My front yard stays very wet after a rain. I tried a couple of strips and I could see mud being left behind, so I moved to the rear yard. The cut was great, not may clippings left visible except for way out back. It had been knocked down a few times this year with the tractor so it was pretty high and thick. I'd say it was probably 10-12". I still had the deck at about 3 1/2" and realized it was a lot of work on the deck and motor. When I raised it to 4 1/2" it cut and ran smooth. The Mid mower on the tractor would never have cut it. The RFM would have done it if I went very slow. But this mower plowed right through it. Not at full speed, but you can't go all out back anyway there because of the rough terrain. With the suspension seat I was comfortable, unlike on the tractor.
I measured my outbuilding several times when I first started looking to make sure the Kubota would fit in there with my New Holland along with my other toys. Something had to sit outside. That would be the 17 yr old Craftsman rider, until I get rid of it. I won't need that anymore.
Overall, I love it. On a scale of 1-10 I'd give it a 9.8. There's always room for improvement on any machine.