Hello I have an update to share following my hairy moment with the Controller 2 bars not flagging out:
I had a bad experience last December with my Controller 2 bars where I crashed and the line didn't flag itself and I was dragged a long way with the kite fully powered on the side of the wind. I repeatedly tried to give the safety line a tug with no luck and I was getting really concerned when getting close to the rocks. Anyway it ended well and I emailed Switch warranty straight away.
They sent me a replacement swivel with bigger holes which I just fitted on today. Firstly I had difficulty getting the safety line out of the old swivel, which really shows that there is an issue with the first two inches of the centre line being thicker.
Anyway the good news is that the replacement swivel is much better and there is not no friction when I pull the safety line through the bigger holes. I have not tried it with a QR but I'm now a lot more confident it will flag out.
I really hope that all new Contoller 3 bars come with that swivel.
Here is a picture of the two swivels with the newer on the left: