I have a serious question about the Whisker Biscuit.

Does it work (or is it advisable) to use a W/B designed for aluminum shafts if you're going to shoot carbons? I don't even know that W/B makes two different sizes, but someone told me they did, and that if you just bought the bigger-holed aluminum W/B, it would create fewer problems for the carbons. (less fps loss, less vane wear, etc.)

Does that make any sense? Sorry if that's already been addressed earlier. I thought I read this whole thread, but I had to break it down by chapters.