I'm curious to see if anyone has tried a Bartolini preamp with a stock pickup in a Stingray 4 string. (I know it's been done out there in a 5 string and Sterling but they have different pickups; ceramic I believe). I'd like to know how it sounds in a 4 string with the stock pickup. If so, what preamp did you use? Anyone one out there do this? Comments? Reviews? Thanks!!!