I dropped a set of geezers into my affinity p/j. Went without any issues whatsoever. I was done in about 30 min. The one thing I was concerned about was the route to the jazz pup cavity. When I first installed them I tried to slip the wires and connector through to no avail. I tried the next day, a little harder this time, and it squeezed itself on through. Fit like a glove.
They sound friggen awesome! They are a tad mellow for my tastes, but that's ok as my P and ATK are aggressive sounding enough so it's nice to have a bass that can get some vintage sounds that are still pretty aggressive IMO. As far as vintage goes. They're better than the stock pups that were in the affinity before as in they're more balanced to my ears and have a stronger and smoother mid presence. I was playing along to paranoid last night and it was pretty spot on. I dial a little more treble on than geezer did with some external preamp action. But overall, great, strong pups. I'm happy and they will stay in my p/j for a long time I'm sure.