So I have a 1A stem and the inside of the clamp is completely smooth. No matter how tight I crank the bolt I can still turn the bar if I try hard enough and it's not hard enough to make me think it will be safe for riding. Has anyone else encountered this? The texturing on the cinelli bars is not very rough either to that doesn't help. I was thinking of either a shim of some sort or texturing the inside of the clamp, say with a knife or razon and putting lines in it.. any suggestions before I mess it up?