Just noticed something which perhaps I should have realised earlier. Each lick ends on a root note. Each bar that doesn't end on a root leads to a bar that does. The result of this is that all even bars end on a root and most odd bars do as well. This should help me out with improvising a bit as I tend to try to cram too many notes in each bar.
Toby, do you have any tips on getting that nice tremolo sound on your long notes? When I try this the whole guitar is wobbling around?
There's lyrics for Bad Luck Blues here:
http://www.luckymojo.com/bluesbadluckjefferson.html
But I'm not sure how they fit in the meter of the tune.