One of my first homemade guitars from parts was an Ibanez RG570 that I put together in the late 80`s. I had a Dimarzio X2N in the bridge and their Fred model in the neck slot. The Fred was an F-spaced bridge humbucker, and it ripped in combination with the X2N. I don`t think I would have been happy with two of either of those in the same guitar.................