The size hole will make a huge difference. I have an Alpine Micro Quad I got from a buddy and he had a biscuit on there that was too small. Even drawing carbons thru it made a pretty good noise. I changed it out to a larger biscuit and no noise. I was getting a small amount of noise with the aluminums, though, even with the extra large hole and plenty of clearance. It wasn't much but enough to make me go with the carbons. Not a big deal. I'm O.K. with the carbons and the WB. If I ever decide to go back to aluminums I'll put on a drop away. But I'm getting great groups with the WB and no complaints with the carbons so it may be awhile before any change.