In reply to Rob Exile Ward:
The title ' safety alert' might be slightly unfair to WC since a belay master is in the instructions for use. Perhaps ' safety reminder ' is more appropriate.
However, I also had an issue with the SRC I had become complacent with and didn't check with the owner of a rope I was using. An older skinny single rope looked like a standard diameter rope. And it worked as usual for most of the climbing we did that day. Only when my climbing partner was working a section of a route over and over, the rope flattened in the section and the SRC lost its control on the rope. Luckily no one was injured.