I have a Korina McCarty Soapbar that I love, but I'm wanting to try something different from the P90s. I'm entertaining the idea of swapping in Narrowfields like I've seen on some Anniversary SAS guitars. I know the NF3 is a Korina body and I love the sound of the Narrowfields in that guitar, so I was thinking Narrowfields might sound great in my guitar. I've never swapped pickups in any guitar before and I'm not sure what the size of the routs are on this guitar. Does anybody know if it would be a direct swap with respect to pickup size? Or would I need to possibly check out some P90 sized humbuckers in order for the new pickups to fit without any alterations? Thanks!