Has anyone any guidance for raising the seat belt guide fastened to the back of my driver's seat? I'm not particularly tall but I find the seat belt pulls tightly down onto my right shoulder which is slightly uncomfortable. In my "normal car" the belt guide is fastened to the door pillar at a position several inches above the shoulder which keeps the belt loose and away from the shoulder until it's really needed but not so in the Plus 4. Any ideas gratefully received.