Hi, I recently got a used DJ5. The former owner stated it has Aero PUs. But I don't find it overly aggressive (strung w. Lakland SS). So I have been thinking it might have the Lakland PUs. How can I go sure? Do the Lakland PUs have exposed polepieces? What about the length of the PU? The bridge PU measures 4,09" (10,4cm) as opposed to 3,7" (9,4cm) on my Sadowsky MV5.