I have a stock active jazz with stock noiseless pickups. I'm trying to think of some good mods, but I'm not sure what's available and what sounds good. Also my current internals are a little unstable. Every now and then they'll cut out... but not consistently. Basically I'm going for a thick sound. Are there any drop in preamps that would work? Also which pickups would be the best for direct replacement? I also really don't want to have to route anything out, just drop in type of stuff.