What I should have asked, was "what broke?"

IIRC, looking top down at the mono riser there is only 1 bolt visible. What I was getting as was that the bottom riser block stayed put, while the rest appeared to stay with the extensions. Are there bolts going up into the mono riser AND down into it, holding it all together? Was the failure carbon, metal, or improper installation?

EDIT: and obviously I'm not actually looking to you to answer just curious as mono riser seems to be the trend and, well, I was never really that comfortable with 4 bolts and aluminum bits.