Hi! Just a little something to try if you want... While playing the solo for "China Boy" the other day I made a little mistake, but it sounded real cool. In measure 36, after the triplet, instead of playing the A on the 7th fret 4th string, hit the A-flat 6th 4th string. Sounds real cool. I haven't taken the time to figure out why, but it's probably like a bluesy seventh or something. Try it out! You may dig it too.