At a certain point in diving, your BCD stops being just “the thing that holds the tank” and starts to feel like an extension of your torso. You begin noticing small details and find it easier to settle into a calm, trim position.  That’s often when divers get curious about backplate-and-wing (BPW) systems-not because there’s anything wrong with a jacket-style BCD, but because they’re ready to experiment with a setup that feels more bespoke to their diving style.  The catch...