You have your surface marker buoy, your compass, your reel, your flashlight - great! But now you need to attach it to your BCD. Grab some high-quality hardware to keep everything handy and attached. Building your dream back-plate system, do not forget all the awesome detailing in the hardware. The salt water can degrade lower quality materials rather quickly, so make sure you don't skimp here - a bolt snap that no longer snaps does nobody any good.