Excellent description, thank you DoctorMike. I especially like the solid ring around the handle as a solid attachment point and will incorporate that.
OK, since you mentioned it, I will tell the story of the split ring, before I switched to the solid ring and double attachment!
Diving the San Diego off Long Island, ripping current going down the line. I had my camera clipped and I felt the steady tug as we descended. Suddenly I didn't feel the tug. Looked down - no camera.
I was in mid water with limited visibility and current, no way that I was going to leave the line and head for the bottom to look for it. So I said all sorts of unpleasant things to myself, and spent the dive sulking instead of having fun.
When I got back on deck, the captain was laughing and said "Hey, Mike! Did you get any good pictures?"
Turns out that the camera had gotten snagged on the line as the split ring gave way, and the next diver down had found it and brought it back to the boat. I hugged that guy, paid for his dive, and bought the solid ring the next day!