My dealer had this installed about a year ago after I complained about the seat. The factory (old) setup tore open the back of the seat (the metal part) in about 20HR of use.
I was told at the time this was a "JD prototype" that would be fitted to production tractors 09. At the time they said it was one of a "couple" JD had. I "assume" the units are shipping with this now...
It takes all of about 3 seconds with ONE HAND to spin the seat in either direction. I could not POSSIBLY be happier with this setup.
The zip file has a short video of operating the seat.
Yes, the seat switch is disabled in these pictures. Of course I wouldn't recommend anyone else doing so...
Best regards,
Sean