I recently aquired a Lakland 55-02 Deluxe. It has the USA Barts and pre. The bass plays beautifully, but since the strings are matched to the curvature of the fingerboard the A string doesn't seem to have quite the same Umph or output as the other 4 strings. I assume it's because it is the farthest away from the pups. Bartolini's site seems to suggest they tailor the pickups output areas to the fingerboard curvature of the particular bass they are going to be installed in. Even though they custom make these for Lakland, that doesn't seem to be the case here. Before I go ripping this bass apart, looking under the pickup covers, does anybody know if there are adjustable pole pieces under there (either pickup)?