Hi Kent, when I was sculpting the sleeves part of the shirt (from 1:00 to 2:00). I also used Clay Strips brush as you did. But the bottom of the sleeves kept shrinking upward, away from the arm and became hollow inside. I saw that in the video, your sleeves just seemed to add more geometries downward along the arm. I could not find the difference about the configuration between us.
Wish for your help! Thanks!