We do leave some play between the handlebar clamps and the clip plates as the fit is sometimes tight. All you have to do is to slightly raise one clamp relative to the other. You do so until there is no rattle while still being able to slide the bag in and out easily. You should be able to fine tune the fit until perfect. A tiny drop of grease at the contact point between the clamps and the clip plates will help a lot for a smooth operation. You can also slightly angle one clip plate relative to the other.