Think of the "Ghost Diver"—your body, backplate (if any), wing, and exposure suit. When you remove the cylinders, you should be able to hover in horizontal trim, motionless, with your hands at your sides or crossed on your chest. You should require zero fin movement to maintain depth.
Many divers try sidemount once, feel like a barnacle-covered anchor, and declare it "unstable." Others succeed brilliantly, gliding through restrictions with the grace of a fighter jet. The difference between struggle and success is not talent or money. It is adherence to a few immutable . Sidemount- Principles For Success
Success Principle: Trim is a property of the diver, not the tanks. Recreational backplate divers love their continuous webbing—one piece, no padding, minimalist. In sidemount, you cannot simply thread the same rigid straps sideways. The human torso is conical, and your shoulder blades move. A poorly fitted sidemount harness will rotate tanks into your armpits, pinch your neck, and cause lower back pain. Think of the "Ghost Diver"—your body, backplate (if