The odometer (little lcd screen) on my 1997 heritage softail somehow got ruined. I cannot see any numbers. I already know that I need to replace the speedometer. I know that the new one must be sent to the HD factory to have the milage corrected. So my question is if I purchase a used speedo off ebay with a previous milage already on it can I send that one to the factory to have the milage changed or do I have to buy a brand new speedo at 4x the cost? Also just so I'm sure, I need a HD part number for the speedo just so I know I'm getting the right one (they all pretty much look the same in pictures). Thanks in advance