Maybe I'm an odd duck- I installed a spinner on my 790, and left it on for three months. Finally, I got tired of fooling with it and took it off.
It seemed I was always hanging up on it while getting off the tractor. I carry a revolver for predator control while in the field, and I scratched the grip twice on that spinner knob. Plus, other than a raw palm turning the wheel while bushhogging, I haven't missed that thing one bit. I plan to just wear gloves from now on when lots of turning is in order to help protect my hands.
I liked that spinner for a month or so- then found it was in the way more often that it helped.
Just my .02 worth- it's worth what you paid for it.
C1