Cool! Glad it helps. And yes, those four strokes are a frequent reset and focus, while still getting enough air. Also, never fear to get air breathing on 1's if you need the air; I do it frequently in ow. Breathing on 1's your head doesn't have time to get out of position :-) Sun Yang breathes on 1's last two strokes going into the wall, and on 1's first two strokes after the wall.