Sorry for your losses, both adhoc and fatmanmedi, in the first case, it could be serviced at quite a cost and in the latter, for your total lost as well as the images.
No equipment is fail proof. We just have to be really careful to check them every time we take them out for use and while being used. We have various fixes, but none would be totally absolute.
I agree with Trapimun. But I did my own roll as photo show. The original BR strap was totally wrinkled and looked bad, so I replaced with another strap I bought which happened to be thicker. The old BR carabiner/ring were replaced with SunSniper hardware. According the SunSniper, there is a steel bearing to eliminate the twisting of the strap thus loosening the connecting screw. I used this setup for over 2 years and have not found the screw loose every time I looked.
Hope that no one suffers from catastrophic problems from any straps you use.