[Bars 65-69] Switch over to the bridge single-coil here and turn the echo pedal back on. Adding palm-mutes will take some of the edge off the brighter treble sound - the aim here is to keep your dynamics even. [Bars 77-end] Here a nifty modal interchange or ‘borrowed chord’ trick is used. The Eb is borrowed from the parallel tonality of Fm and is thus called a bVII in the key of F major. It ’s a really common idea that’s used a lot in rock, pop and blues (listen to The Kinks’ second hit single, All Day And All Of The Night, for another classic example).