thanks nick for your quick responce.hey, its not old its mature!yea hoping the same thing about the battery fixing the checksum issues.would a bad battery cause these type of issues?when i went to access banks 70 on it would go into that E12 error then i would have to reboot.some patches when i tried to access would cause the E12 error.by the way do you still service these units and if not do you recomend anyone in sanantonio texas?does this unit use the slip on battery or soldered 2330v?thanks again my brother.