Question RE: IP Autographs at the Colbert Report

[autographhound57]

Hello everyone,

Hope all is well. Quick question...I have tickets for an upcoming taping of the Colbert Report and was hoping that I'd be able to either get an autograph from Stephen Colbert. I have seen a million YouTube videos of Colbert guests signing outside the studio, but none of Colbert. Does anyone know if he does in fact sign before/after his tapings? If so, what time does he arrive?

Two other quick questions: A.) What time do the guests normally arrive at Colbert? Letterman?

Thanks so, so much for your help!