I was trimming brisket fat wrong for years until a guy in Lockhart set me straight
Always left about a quarter inch of fat on the flat, thought it kept things moist. Saw a pitmaster at a joint in Lockhart, Texas, trim it down to maybe an eighth inch, almost see the meat. He said, 'That fat cap's a heat shield, not a baster.' Tried it next cook, bark got way better. Anyone else used to leave too much fat on top?