I pick by the mantra of Down ''on'' the beat and Up ''off'' the beat. Looking at the picking directions that are displayed between the standard notation staff and the TAB staff I notice that there are a number of crotchet notes(quarter notes) that are ''on'' the beat but have up strokes. I would change these to down strokes. These occur on the last note at the end of line 1, last note of Bar1/Line 2, last note of Bar1/Line 3, last note of Bar3/Line 3,and the last note of both bars 2 and 3 in line 4. However, I'm a bit uncomfortable changing Grier's picking markings!!
I was looking at the first bar as an anacrusis bar(a pick up note) rather than a full bar, so to clarify the up strokes in Bars 5,7,9, and 15 should all be down strokes because each of these down stroke ntated notes occur ''off'' the beat.