My kids go out with me in the car sometimes, 10, 8 & 6 (B,B,G). Now all this time I have had 3" belts with Tillets and the Volvo booster, I have always felt the 3" belts are a little inflexible/wide, there use to be 2" Caterham branded 4 points. Will using these make any difference to holding in the kids or is it just the way of things with 4 point belts? cheers