Fair do's, although Clinton's a guitarist so he should be able to suss out a lot of it.

Re the vibrato, my teacher when I was a kid never managed to teach me vibrato. It was the major reason I gave up in the end - I couldn't take my Grade 6 without it, and after months of trying, I was still no closer to being able to to it than I was at the start. My body simply wouldn't do it. Sure, I could move my arm backwards and forwards, but it simply wouldn't do vibrato-style small movement and speed. If I want vibrato now, I fake it by moving my finger like I do for rock-guitar vibrato.

Graham.