Minor breakthrough today (reading rather than writing so a tad off topic) I remembered how when I used to do downhill mountain biking the mantra was always look through the trail not down your forks. The idea being you should process what's coming up and not what's happening right now. Once your front wheel is on the tree root it's too late you should have gotten into position earlier.
I applied the same thinking to a line I'm reading and it flowed, it really did. Weirdest sensation looking at and analysing a series of notes while my hands are playing the bar before. Really strange and strangely exhilarating. I want more!
The other thought, which has crossed the old bean before, was am I really reading or is this simply muscle memory having played the thing so many times? Simple test, close the book and try to play along. I actually knew very little. Which is either great - my reading skills are developing, or crap - my memory is collapsing like a flan in a cupboard.
I'll take the former.