Tremendous customer support - I would not expect anything else from FeatherThe inside scratches are normal, according to Feather Company they are the result of an inspection process which tests if the razor can load a blade properly using its excursive gauge. One of the purposes of this test is to make sure it does not pose a danger to a user due to insufficient blade loading
A few years ago I bought a DX that has arrived with scratches both inside and outside. The seller promptly exchange it with another one that had the exact same problems so I decided to write directly to Feather Company considering my SS is flawless. They are amazing regarding customer support! They asked me to send the razor to their company headquarters for inspection and they sent me another one straight from the factory.
And at the end they sent me PDF named Razor Inspection Results complete with pictures ! I have attached it to this post. The cause of the external scraches could not be determined but the inside ones were normal.
Hope this info helps