Hi! I don't know if it's a luthier's corner question, but... I heard that there were two types of Seymour Duncan pickups designed to fit MusicMan StingRay. One type was good, the other had some flaws. Could anyone tell me what was the diffrence, and how can I know which is which? I'm thinking of putting that kind of pickup to my bass, and I wanted to choose right Thanks for ALL the insights.