Re: Preventing PML from Erasing ECU Re-map
Yes, I used to instruct them exactly that. But you should have a very good relationship with your CSA and also, he's gotta be understanding (to your mods)
A better method would be to get an understanding from your tuner that should PML unknowingly overwrite your map, you can always go back to them to reinstall. All tuners that I go to offer this reinstatement service free.