Something that gets overlooked with drills is how they work on your nervous system, not just your stroke. Panic in open water usually comes from your brain treating chop and low visibility as a threat, and the fix is repeated calm exposure in a safe setting. Twenty minutes of side kicking in a quiet pool is basically that, boring on purpose so your body learns nothing bad happens when your face is in the water and your breathing is limited. The drills themselves are almost beside the point, the real gain is your brain filing that feeling under safe. Kind of makes you wonder how many people quit drills too early because they expected it to fix their catch instead of their nerves.

Ha, I've been double grinding for years mostly out of habit and pure fear of my old boss haunting me. You're making me think all that extra work just turned my patties into meat paste for nothing. Gonna try the single coarse grind this weekend and see if I've been wasting my time.