Hey, I guess this is something I've never really paid too much attention to, but I noticed it recently with the used SG I bought recently. But on the Sg's open coil humbuckers, one of the halves has the flat-head screw tops. Whoever had this before me must have playing with them, and made them all straight across, perpendicular to the strings. What effect does this have on the sound? How should they be aligned?