Chris,
I'm straying far from the original topic here, but I recall, and you may be aware, that Chad Cromwell ditched Mark in the middle of the Sailing to Philadelphia tour back in 2001, and Mark had to fill his seat on short notice. IIRC Guy sent Danny Cummings a recording of some shows and maybe the stuff they sent the band before the tour rehearsals, and Danny had just a few days to get it all down right. Would this be challenging for someone on your (or Danny's) level, stepping in on short notice in the middle of a tour?