I'm a war photographer working in hazardous locations around the world, and I need a small, compact, lightweight, reliable, quick-opening locking device to attach my pro cameras to my camera vest or a neck strap. I've been using plastic quick releases but they're not strong or reliable enough. Then I tried using McGizmo SS jewel clips, but I found that those accidentally opened if twisted the wrong way. I need a really low profile, strong device, as I often hang my heavy cameras by only strap or attachment point. Any suggestions?