I have a 2005 4.0 V6 with the base 4 gauge cluster. I am looking to upgrade to the 6 gauge cluster and was wondering if I bought one used if I could just program the new one by just tuning the car back to stock since the milage is saved into the stock ECU info. Has anyone tried to do this or know if it will work so that I know if would be worth a little bit more just to have one shipped to me already programmed.