View attachment 53139
I'm really paranoid about always having redundancy, so I modified my BlackRapid strap a bit. I swapped the tripod-style screw mount for a QD connector. And then I made a heavy-duty, adjustable nylon safety strap (nylon webbing, box stitched, QD connector, and a 50lb rated locking carabiner).
The main connector gets QD-connected to the lens foot (either an RRS foot or a Hejnar foot, depending on the lens). And the safety strap gets QD-connected to the RRS L-bracket on the camera body. I can unclip the safety strap if using a short lens without a foot and connect direct to the L-bracket. And I can adjust the length so there's no tension on the body, depending on which lens is attached. Also, for feet that don't have enough space to leave the QD connector in when mounted on a tripod, I can still keep the safety on the body if I think I need extra security.
The only downside to this is that sometimes I get the safety strap wrapped around the main strap, if I'm not paying attention when lifting up the camera to shoot. But that's a quick fix. Either just turning it around or unclipping and reclipping the safety.
Overall, I love this system. Works great and I have peace of mind, knowing that in the extremely unlikely event that one fails, the other will still hold.