Hey, everyone. So I have a book that's CGC SS with an autograph by the cover artist. I have the opportunity to get an additional autograph by the actor depicted on the cover at a convention this summer. However, traditionally CGC is not on location for whatever reason, but CBCS almost always is. I know I can have CBCS verify the cover artist signature (especially if they crack the case) and witness the actor's signature, but I feel this is kinda gonna affect its value and is just a bit too much of a process. Are there other options? Is there a way of finding local CGC certified witnesses that may be attending the convention and somehow send it in to CGC that would be acceptable? Any input would be appreciated. Thanks.
Neil