Same boat here this is like a loose thread I pulled and I’m now becoming horrified of my swing more than beforeIn the videos of myself I'm looking at with driver I actually appear pretty straight in what they would call a neutral spine maybe ever so slightly bowed. But with irons, I'm entirely bowed. I wonder if this posture contributes to me being all 'bunched up' in my shoulders and my lead arm pinned to my side in my follow-through with irons. I bet it does. It looks terrible on video and feels even worse. I know I'm not rotating through properly but I never thought about posture being a part of that.