Well, to be fair, in the end you have done exactly what the service manual tell you too do in these situations

Could you tell what you needed to do to get the scale programmed, I imagine you started with my copy of the EEPROM, did you just replaced the numbers with those from your scale?
Attached you can find a nice document that tells you how to check a balance, if you want to be sure it's performing within specifications.
Enjoy your Mettler