In reply to Jim Walton:
there are some reports of 9.1mm slipping/inverting
there are also people using sub 9mm and having no issues
i think this is because there is not a "recommended" (tested?) rope for the device
Petzl issues a warning on their connect adjust that you should be changing the rope, all bets are off if you do as far as they are concerned.
Lots of factors to consider i guess depending on exactly which rope you are using with it.
Shame that Kong doesnt sell this with some approved rope