I've had mine for a year and no issues as of yet. I did have one cable sleeve pull off, but didn't effect anything.
You should push the wires into the connector and verify they are all seated properly. It only takes one that isn't full seated to cause a hardlock.
Also, how did they fray? Where you constantly removing parts and replacing them? Normally they just sit there after being plugged in, not moving, and can't fray is why I ask.