Wrote out the notes for postion 1+2 of the pent on a fretboard map and am now looking at it as I play. Actually seems to be working !
I've even worked out the major 3rds ? from A,D+E and have started to add those in a bit.
I guess sevenths will be next.
It really does help understanding what you are playing rather than just memorizing how to play it, it's given me a bit of impetus to get on and learn some more.