I recently received an Ibanez 7420 with and Ibanez Lo-trs tremolo. The E and A strings buzz bad in the middle of the neck, but not the B string . The E and A appear to be sitting lower than the the B slightly. I read that floyd saddles are supposed to be arranged in a certain order. Does anybody know the numbering order for a 7 string? if that doesn't help I read and seen that you can shim floyd styles bridges. Is it worth to spend the $8 or shims or will trying to use something like aluminum foil be just as good?