I have a 2004 Civic VP (Value Package). I would like to add a tachometer to it. I would like to buy either a new or slightly used EX gauge cluster and do a direct swap. My question is - since my odometer is digital, will the new odometer read my current milage or will it read the milage on the new odometer? Is the milage on my car stored in the ECU or in the speedometer itself? Any help would be appreciated - Thanking you in advance. Jeff