I have one of the Crossroad Concert DVD's with Johnnie playing the Firebird-also played sitting in a chair for that concert too. As soon as his songs were over a roadie\attendant? took the guitar and helped him off stage.
A Firebird is one big chunk of mahogany all right-here is a comparison of my Epi Firebird to my Epi Les Paul, SG and Sheraton-the SG and Les Paul look quite small....