Default [Q] Tablo Tab7012

Hi I have just aquired a Tablo Tab7012 and want to update the firmware.
The version installed on it is 4.0.3
Id love to update to kitkat, but jellybean would be fine.
I understand that the unit is basically a re badged Scroll Excel although I need to be sure before I update so I dont brick the thing.
Can anyone help?
thanks