bar 10 and 18 are a particular trademark idea. Although they’re pitched and you have a rough target point to aim for, the staccato nature of the first note in the phrase means it doesn’t have to be super precise. [Bars 22-45] There are simply loads of great improvised ideas in these two verses, so you should take what you can for your own ideas. Duane rolls back his volume a little for a cleaner sound and tends to build dynamics and melody in the two-bar turnaround in each 12-bar sequence. If your guitar action is set high (ish) you should not need bags of gain for lots of sustain.