That reminds me of Stan Ricker's bass. Anybody familiar with it? Ricker is one of the top mastering engineers in the music biz and plays a modified 5-string as a hobby. Check out the brass weights on his tuning keys, which he says are to increase sustain. Scoll down this interview for some description.shwashwa said:...also, i think the mass of the scroll plays a part in how much sustain it has...