Christophers first ''box'' is moveable

6th string frets 5.7.9

5th string frets 5.7.9

4 th string frets 6,7

so for an experiment start on any of the notes on the 6 th .

then do the count 5,7,9 5,7,9 and 6.7 and recognise how the scale sounds out.

This works on any of the strings until the B string gets involved then you may have to move up the string by a half or whole step but you will hear it.

What he is doing is moving up a string to find the next notes rather than linear

any note, up 1 string and down 5 frets get you the same note ,then you have to know if your wanting to move a half step or a full step back up the neck

Dave