[VIDEO]http://www.youtube.com/watch?v=ZfTgw9T-y28]YouTube - Red ft Brian Head Welch ? Fight Inside, Death Of Me (Live @ Dove Awards 2010)[/VIDEO]
Head appears to be playing an RGD styled Ibby, but with a fixed bridge and longer scale. I know the RGD's are already 26.5, but that looks even longer than that.
That looks like a 30" scale. Similar proportions to this 30" BFR JP baritone:
[VIDEO]http://www.youtube.com/watch?v=YBgNuP86BNk]YouTube - Joe Bonamassa - Ballad of John Henry - Royal Albert Hall[/VIDEO]