I just realized you were probably talking about my volume difference thing...
I decided to put the UOA5 in the Custom anyway, not to solve the volume thing, just out of curiosity. After I swapped the mag I re-adjusted both of the pickups, due to the difference in outputs of both of the Customs...after I did that I didn't notice any difference in volume.
But after that the bridge pickup got this really nasty fizzy tone, and the answer to that is in my last post.
I don't know which you meant, but now you have the answer to whatever question you were asking.