I have received 5 slabs back from CGC over the last 90 days and 4/5 of them had noticeable white scuffs, dots or streaks that appear to be on the inner well. The fifth one also had a scuff but it was smaller than a 1/4 of an inch and it was on a corner so I disregarded it. They diagnosed the problem as mechanical errors that occur from vibrations that occur while shipping the comics. To CGC's credit they have offered to reholder them for me at no charge and pay for shipping and the customer serv