I've just made up a few runs of MC5000 cable, but I've used KLE Harmony connectors rather than the MS Audio plugs, as I could not find a supplier of those. I followed Brian's model, and left the shield unconnected at both ends. The result in my system is hiss, hum and other interference. Other than this background noise, the cables do sound good, but I will have to do something about the hiss. I'll be rewiring the plugs so that the shield is connected at the source end, and I'll post the results in a few days.
If anyone is interested, the cables are installed between my DAC and Pre amp, and between the Pre amp and the Power amps (I bi amp, so there are two pairs of cables between the pre and the power amps).