I think you do not want an over 2 Year old ND96850 that was delivered with the wrong Firmware and is not compatible to the new Bluetooth dongle.
When you want to make changes to the settings, the old Bluetooth makes a lot of trouble and some nececcary parameters can not be change anymore.
I have the same issue with the 721800 I have bought, but I do not need weakening field in my scooter, as it is fast enough and all the other parameters that can not be changed were not nececcary, because it runs smooth and powerfull. With the ND72680 I had to tweak a lot of parameters to get a smooth drive, as it was shaking at different speeds. I could reduce it to only shaking at top speed, so I reduced that a little an everything was good.
I also was not able to save the changed parameters with the PC-Software, but I could test drive them.
Probably this ND96850 will end in a bigger lawn mower converted to electric, when it does not do a good job in the motorcycle I want to use it for.
Want to convert either a SZR660 or a SXV450/550 to electric, wathever I get for cheap and I am aiming for 40kw peak power.