so i just picked up one of the old duncna pups with the preamps in them (you know the three little white switches. I just installe dit in my jazz and had to tape the battery to the outside of the bass and i noticed that the battery go treally hot when i was playing. is this normal? should it get hot or warm? well duct tape damage the finish on my bass? and last but not least what do the switched do exactly, i can tell one of them boosts bass and logic would have the other two do treble and mids but i can't tell much of a differnece.