There are three distinct models ofthe BBucker-
#1= slightly underwound (lower output)
#2= wound to the "average" late 50s PAF (average output)
#3= slightly overwound (hotter output)
As you can see, these specs make a big difference as to where the optimal positioning of each pickup would be, ie, given two different levels of "hotness", the hotter by the bridge, the less hot by the neck.
Makes a BIG difference, especially since I prefer to use a hotter pickup in all applications.
As it turns out, the two I have are stilll in their mounting rings, one clearly neck, one bridge. The person I inherited them from assures me the neck is a #1 and the bridge a #2 which makes perfect sense.
Problem solved!
If the "hotter by the bridge, milder by the neck" principle still does not make sense to you, go to the DiMarzio website where they explain it in more technical terms yet very clear.