I sometimes think there are clearance issues between the Recaro seats and the door panels that allow for the belt to become pinched especially if you have harness pads. I noticed my MOMO harness pads work very well in allowing the belts to retract, but, the plain black harness pads I had on earlier caused me big balls.

I especially have to be cautious with passengers who are unfamilair with this...I always give a subtle warning to avoid paint scrapes and chips.