Watch the The Wes Coast Solo 2 online guitar lesson by Chris Buono from Guitar Lab: Blues Soloing
As you play through these choruses check out what's going on in bar 4 in all three solos. There you'll find a displaced tritone ii-V. So as not to overload you with the theory behind tritone subs and tritone ii-V's we'll just focus on nailing the chord tones here and the voice leading required to make it sound smooth. Save your tritone queries for Try Tone where "it's on" big time when it comes to this concept.