Disagree ? Really ? Are you actually trying to deny that plastic album slides are not known, and very well known, for scratching coins ? Archival quality flips are no different, they are also very well known for scratching coins when you put the coins into the flips and take the coins out of the flips. They are also very well known for causing rub on the high points because the coins can slide around inside the flips. Even PCGS and NGC agree with that. And so does everybody else, but apparently not you.