I've never modded a p bass before. Can you tell me if there are any issues between the Mexican bass, and the fender replacement guards' pickup routing? I'd be surprised if the Mexican pickup is different size than the multitude of replacements out there, I might want to try a new pickup someday down the roadSome 13 hole pickguards dont 100% line up with the holes which means putting the screws in on a angle which can lift the pickguard up in places. The best thing to do is to do a google search for a 13 hole pickguard for a Fender Player Series Precision Bass.