My M62 has hydr self leveling. I have a switch just below the loader control arm to turn it on and off.
I leave it on all the time. Mine is not harder to dump or curl the bucket back. For my applications, it really isnt super useful (not many pallets, hay bales, dumping in back of trucks, etc). It does affect the curl time, but the M62 is already faster than I would want to move anyway. Not only that, but my bucket has level indicators on it, AND I have the indicator on the FEL arm. Lots of choices! IMO, not worth $1800. However, maybe for you it is.
I heard a few that like it for their spouses/kids that move hay bales...makes it safer for them to lift and transport them.
It looks like there is also a "spill guard" type valve kit that prevents the bucket curl from coming back too far and spilling bucket contents onto the operator/hood of the tractor as well. Perhaps that version prevents some curl function?
First off thanks for taking the time to respond
You mention is does slow curling, does it slow curling only when on?
Next is curling question also, with it turned off can you bang your buck curls to dump sticky loads from the bucket?
Does your tractor have Kubota soft ride KSR?
Thanks