American made prs pickups are standard spaced and the imports are closer to f spaced. That said, standard spaced works just fine in both as does f spaced. F spaced will actually line up with the strings slightly better since the prs bridges are spaced closer to that spacing. If you look at any prs with the american made pickups you will see that the outside strings are ever so slightly on the outside of the poles. Keep in mind it is only 3mm over the entire pickup. That means each string will be off center by like .5mm which is really not much, especially considering how a magnetic field works.