Given my initial problems, I've used it several times since and had no problems at all. I've got in the habit of turning the screw away from my body so that it's not rubbing against me as is drops (and I'm more careful as I drop the camera too ).
I've done 8 more gigs and no problems, so I'm going to put this one event down to use error
I have to admit, this strap it friggin awesome. Two bodies with grips and 24-70 / 70-200 for 12 hours and no back or shoulder problems at all ...... awesome!
). 