Just a few muses:

Muskrat Candlelight by Willis Allan Ramsay is one of my favourite songs, and is based on a D to Dmaj7 transition.

I hated listening to Steve Hillage's lead guitar becacause he always played major sevenths where I would play flat sevenths

I love listening to Robert Johnson (the session man who played the wakawaka guitar on Shaft) because he can play major sevenths without sounding cheezy. I hate him because I can't copy his licks without sounding cheezy.

That guitar George Harrison played was a Grammer - he part-exchanged it in the early seventies because the finish checked badly, and I remember having a play on it in a music shop in Shaftesbury Avenue.